chore(deps): update actions/checkout action to v6.0.3 (#1409)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/checkout](https://redirect.github.com/actions/checkout) |
action | patch | `v6.0.2` → `v6.0.3` |

---

### Release Notes

<details>
<summary>actions/checkout (actions/checkout)</summary>

###
[`v6.0.3`](https://redirect.github.com/actions/checkout/blob/HEAD/CHANGELOG.md#v603)

[Compare
Source](https://redirect.github.com/actions/checkout/compare/v6.0.2...v6.0.3)

- Fix checkout init for SHA-256 repositories by
[@&#8203;yaananth](https://redirect.github.com/yaananth) in
[#&#8203;2439](https://redirect.github.com/actions/checkout/pull/2439)
- fix: expand merge commit SHA regex and add SHA-256 test cases by
[@&#8203;yaananth](https://redirect.github.com/yaananth) in
[#&#8203;2414](https://redirect.github.com/actions/checkout/pull/2414)

</details>

---

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---

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.github/workflows/openfeature-node-server.yaml

@@ -20,7 +20,7 @@ jobs:
         version: [20, 22]
 
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       - uses: ./actions/setup-yarn
         with:
           node-version: ${{ matrix.version }}

.github/workflows/release-please.yml

@@ -531,7 +531,7 @@ jobs:
     # TODO: Uncomment this when the package is ready to be released.
     if: false
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       - id: release-openfeature-node-server
         name: Full release of packages/sdk/openfeature-node-server
         uses: ./actions/full-release