Bump actions/checkout from 6.0.3 to 7.0.0 (#32179)

Bumps [actions/checkout](https://github.com/actions/checkout) from 6.0.3 to 7.0.0.
- [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/v6.0.3...v7.0.0)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 7.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/build_rust.yml

@@ -44,7 +44,7 @@ jobs:
           echo "PR_BRANCH=`jq -r '.head.ref' <<<$pr_json`" >> $GITHUB_ENV
           echo "PR_HEAD_LABEL=`jq -r '.head.label' <<<$pr_json`" >> $GITHUB_ENV
 
-      - uses: actions/checkout@v6.0.3
+      - uses: actions/checkout@v7.0.0
         with:
           repository: ${{ env.PR_REPO }}
           ref: ${{ env.PR_BRANCH }}