deps(python): Update cloud-sql-python-connector[asyncpg,pg8000] requirement from >=1.20.2 to >=1.20.3 (#8333)

Updates the requirements on
[cloud-sql-python-connector[asyncpg,pg8000]](https://github.com/GoogleCloudPlatform/cloud-sql-python-connector)
to permit the latest version.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/releases">cloud-sql-python-connector[asyncpg,pg8000]'s
releases</a>.</em></p>
<blockquote>
<h2>v1.20.3</h2>
<h2><a
href="https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/compare/v1.20.2...v1.20.3">1.20.3</a>
(2026-05-26)</h2>
<h3>Bug Fixes</h3>
<ul>
<li>update dependencies to latest (<a
href="https://redirect.github.com/GoogleCloudPlatform/cloud-sql-python-connector/issues/1422">#1422</a>)
(<a
href="https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/commit/6bb9b37ec441d260008e08db837d422a2ad15241">6bb9b37</a>)</li>
<li>Update dependencies to latest as of 2026-05-04 (<a
href="https://redirect.github.com/GoogleCloudPlatform/cloud-sql-python-connector/issues/1406">#1406</a>)
(<a
href="https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/commit/d1282d88fc884be954e1f38cfaa62be2c03b2ee0">d1282d8</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/blob/main/CHANGELOG.md">cloud-sql-python-connector[asyncpg,pg8000]'s
changelog</a>.</em></p>
<blockquote>
<h2><a
href="https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/compare/v1.20.2...v1.20.3">1.20.3</a>
(2026-05-26)</h2>
<h3>Bug Fixes</h3>
<ul>
<li>update dependencies to latest (<a
href="https://redirect.github.com/GoogleCloudPlatform/cloud-sql-python-connector/issues/1422">#1422</a>)
(<a
href="https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/commit/6bb9b37ec441d260008e08db837d422a2ad15241">6bb9b37</a>)</li>
<li>Update dependencies to latest as of 2026-05-04 (<a
href="https://redirect.github.com/GoogleCloudPlatform/cloud-sql-python-connector/issues/1406">#1406</a>)
(<a
href="https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/commit/d1282d88fc884be954e1f38cfaa62be2c03b2ee0">d1282d8</a>)</li>
</ul>
<h2><a
href="https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/compare/v1.20.1...v1.20.2">1.20.2</a>
(2026-04-17)</h2>
<h3>Bug Fixes</h3>
<ul>
<li>update dependencies to latest (<a
href="https://redirect.github.com/GoogleCloudPlatform/cloud-sql-python-connector/issues/1402">#1402</a>)
(<a
href="https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/commit/4bbe1f80581f974e1bd83eecf5f278fcf47026ae">4bbe1f8</a>)</li>
</ul>
<h2><a
href="https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/compare/v1.20.0...v1.20.1">1.20.1</a>
(2026-03-16)</h2>
<h3>Bug Fixes</h3>
<ul>
<li>update dependencies to latest (<a
href="https://redirect.github.com/GoogleCloudPlatform/cloud-sql-python-connector/issues/1379">#1379</a>)
(<a
href="https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/commit/8f79f4ed984fbf3d742df333ddb908af0f1f08e4">8f79f4e</a>)</li>
</ul>
<h2><a
href="https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/compare/v1.19.0...v1.20.0">1.20.0</a>
(2026-01-13)</h2>
<h3>Features</h3>
<ul>
<li>Use configured DNS name to lookup instance IP address (<a
href="https://redirect.github.com/GoogleCloudPlatform/cloud-sql-python-connector/issues/1363">#1363</a>)
(<a
href="https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/commit/18eddc49c905f3caf02b9682c3594b5939b3f9f3">18eddc4</a>),
closes <a
href="https://redirect.github.com/GoogleCloudPlatform/cloud-sql-python-connector/issues/1362">#1362</a></li>
</ul>
<h3>Dependencies</h3>
<ul>
<li>Update project dependencies to latest (<a
href="https://redirect.github.com/GoogleCloudPlatform/cloud-sql-python-connector/issues/1369">#1369</a>)
(<a
href="https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/commit/8cb674531a9dd23520824ac136e4dce7e8ce39b4">8cb6745</a>)</li>
</ul>
<h2><a
href="https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/compare/v1.18.5...v1.19.0">1.19.0</a>
(2025-12-09)</h2>
<h3>Features</h3>
<ul>
<li>Add python 3.14 and remove python 3.9 support (<a
href="https://redirect.github.com/GoogleCloudPlatform/cloud-sql-python-connector/issues/1339">#1339</a>)
(<a
href="https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/commit/a2e8c4d30deeeb73475caf3367acadc58193228f">a2e8c4d</a>)</li>
</ul>
<h3>Documentation</h3>
<ul>
<li>Add sample Cloud Run example application (<a
href="https://redirect.github.com/GoogleCloudPlatform/cloud-sql-python-connector/issues/1335">#1335</a>)
(<a
href="https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/commit/adc25f683059a3f0fe3865d648374dce087cdaaa">adc25f6</a>)</li>
<li>Update documentation to describe how to use Advanced DR write
endpoint. (<a
href="https://redirect.github.com/GoogleCloudPlatform/cloud-sql-python-connector/issues/1332">#1332</a>)
(<a
href="https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/commit/2e1ed211cad6dd63a76fa8c80df6c1d09d112778">2e1ed21</a>)</li>
</ul>
<h2><a
href="https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/compare/v1.18.4...v1.18.5">1.18.5</a>
(2025-10-09)</h2>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/commit/4aaee21a90a9711b40c65fa10ffa888779901796"><code>4aaee21</code></a>
chore(main): release 1.20.3 (<a
href="https://redirect.github.com/GoogleCloudPlatform/cloud-sql-python-connector/issues/1409">#1409</a>)</li>
<li><a
href="https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/commit/90d57e4e3689c03303b684ff38744ca34bc716db"><code>90d57e4</code></a>
chore(deps): update dependency pytest-asyncio to v1.4.0 (<a
href="https://redirect.github.com/GoogleCloudPlatform/cloud-sql-python-connector/issues/1404">#1404</a>)</li>
<li><a
href="https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/commit/6bb9b37ec441d260008e08db837d422a2ad15241"><code>6bb9b37</code></a>
fix: update dependencies to latest (<a
href="https://redirect.github.com/GoogleCloudPlatform/cloud-sql-python-connector/issues/1422">#1422</a>)</li>
<li><a
href="https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/commit/d1282d88fc884be954e1f38cfaa62be2c03b2ee0"><code>d1282d8</code></a>
fix: Update dependencies to latest as of 2026-05-04 (<a
href="https://redirect.github.com/GoogleCloudPlatform/cloud-sql-python-connector/issues/1406">#1406</a>)</li>
<li>See full diff in <a
href="https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/compare/v1.20.2...v1.20.3">compare
view</a></li>
</ul>
</details>
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pyproject.toml

@@ -26,7 +26,7 @@ dependencies = [
     "asyncpg>=0.30.0",
     "pg8000>=1.31.0",  # Sync driver for Cloud SQL Connector in GitHub Actions
     "alembic>=1.14.0",
-    "cloud-sql-python-connector[asyncpg,pg8000]>=1.20.2",  # Cloud SQL Connector
+    "cloud-sql-python-connector[asyncpg,pg8000]>=1.20.3",  # Cloud SQL Connector
     # Data & Plotting
     "pandas>=3.0.3",
     "numpy>=2.4.6",