build(deps): bump actions/checkout from 3 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v3...v4)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/rust.yml

@@ -133,7 +133,7 @@ jobs:
             x86_64-unknown-none,
           ]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       # Cache REF:
       #   - https://github.com/actions/cache/blob/main/examples.md#rust---cargo
       #   - https://github.com/actions-rs/toolchain/issues/54
@@ -171,7 +171,7 @@ jobs:
 #       security-events: write
 #     steps:
 #       - name: Checkout code
-#         uses: actions/checkout@v3
+#         uses: actions/checkout@v4
 
 #       - name: Check format
 #         run: cargo fmt --check