build(deps): bump actions/checkout from 4.1.7 to 4.2.1 (#44140)

Bumps [actions/checkout](https://github.com/actions/checkout) from 4.1.7 to 4.2.1.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](692973e3d9...eef61447b9)

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

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

.github/workflows/pipeline-segment-electron-gn-check.yml

@@ -50,7 +50,7 @@ jobs:
       TARGET_ARCH: ${{ inputs.target-arch }}
     steps:
     - name: Checkout Electron
-      uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332
+      uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871
       with:
         path: src/electron
         fetch-depth: 0
@@ -128,7 +128,7 @@ jobs:
     - name: Add CHROMIUM_BUILDTOOLS_PATH to env
       run: echo "CHROMIUM_BUILDTOOLS_PATH=$(pwd)/src/buildtools" >> $GITHUB_ENV
     - name: Checkout Electron
-      uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332
+      uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871
       with:
         path: src/electron
         fetch-depth: 0