chore(deps): bump mockall from 0.14.0 to 0.15.0 in /bots/echidnabot (#356)

Bumps [mockall](https://github.com/asomers/mockall) from 0.14.0 to
0.15.0.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/asomers/mockall/blob/master/CHANGELOG.md">mockall's
changelog</a>.</em></p>
<blockquote>
<h2>[ 0.15.0 ] - 2026-06-28</h2>
<h3>Added</h3>
<ul>
<li>Compatibility with the <code>#[auto_impl]</code> macro.
(<a
href="https://redirect.github.com/asomers/mockall/pull/686">#686</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/asomers/mockall/commit/fc2c853cf7491c49147170d9f442eeb8d7589c2e"><code>fc2c853</code></a>
chore: Release</li>
<li><a
href="https://github.com/asomers/mockall/commit/551faddeb11e8eb4daeca0fdbff796450895041e"><code>551fadd</code></a>
Merge pull request <a
href="https://redirect.github.com/asomers/mockall/issues/688">#688</a>
from asomers/audit-job-lockfile</li>
<li><a
href="https://github.com/asomers/mockall/commit/21529e363179dc49ffd7cf3547edfa17844e6e47"><code>21529e3</code></a>
Fix the audit CI job</li>
<li><a
href="https://github.com/asomers/mockall/commit/2270cdb77897aeb55326ba730f1c1fc2131cc8e1"><code>2270cdb</code></a>
Merge pull request <a
href="https://redirect.github.com/asomers/mockall/issues/686">#686</a>
from Kranzes/automock-auto_impl-compat</li>
<li><a
href="https://github.com/asomers/mockall/commit/d3b041dae87aea957f70424c640c62720039b700"><code>d3b041d</code></a>
Add compatibility with the <code>#[auto_impl]</code> macro</li>
<li><a
href="https://github.com/asomers/mockall/commit/055886ee2fdc6656e1c216e85b45c49a44a001ea"><code>055886e</code></a>
Merge pull request <a
href="https://redirect.github.com/asomers/mockall/issues/687">#687</a>
from asomers/clippy-june-2026</li>
<li><a
href="https://github.com/asomers/mockall/commit/ed4bf074003e23413fe8363534290cbe56183650"><code>ed4bf07</code></a>
Clippy cleanup</li>
<li><a
href="https://github.com/asomers/mockall/commit/f7a4d6f750a1f7ca4c1f24a357be8b8ede12ecad"><code>f7a4d6f</code></a>
Merge pull request <a
href="https://redirect.github.com/asomers/mockall/issues/685">#685</a>
from asomers/clippy=may-2026</li>
<li><a
href="https://github.com/asomers/mockall/commit/ba151801be1657b68d5cfc0c99abafef5fa27111"><code>ba15180</code></a>
Clippy cleanup: useless_borrows_in_formatting</li>
<li><a
href="https://github.com/asomers/mockall/commit/de22d570dc00c3ddce603bf9105eb5f82e7c5a90"><code>de22d57</code></a>
Merge pull request <a
href="https://redirect.github.com/asomers/mockall/issues/684">#684</a>
from asomers/github-workflows</li>
<li>Additional commits viewable in <a
href="https://github.com/asomers/mockall/compare/v0.14.0...v0.15.0">compare
view</a></li>
</ul>
</details>
<br />


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bots/echidnabot/Cargo.lock

@@ -79,7 +79,7 @@ urlencoding = "2.1.3"
 criterion = { version = "0.8.2", features = ["html_reports"] }
 tokio-test = "0.4.5"
 axum-test = "21.0.0"
-mockall = "0.14.0"
+mockall = "0.15.0"
 tempfile = "3.27.0"
 wiremock = "0.6.5"
 bytes = "1.11.1"