ci: Bump actions/checkout from 4.2.0 to 4.2.1

Bumps [actions/checkout](https://github.com/actions/checkout) from 4.2.0 to 4.2.1.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@d632683...eef6144)

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

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

.github/workflows/pr-check.yaml

@@ -26,7 +26,7 @@ jobs:
         with:
           go-version: ${{ matrix.version }}
       - name: Checkout code
-        uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871
       - name: Check module vendoring
         run: |
           go mod tidy
@@ -51,7 +51,7 @@ jobs:
         with:
           go-version: ${{ matrix.version }}
       - name: Checkout code
-        uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871
       - name: Go code prechecks
         run: |
           go build ./...
@@ -74,7 +74,7 @@ jobs:
         with:
           go-version: ${{ matrix.version }}
       - name: Checkout code
-        uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871
       - name: Go code prechecks
         run: |
           go test ./...
@@ -83,7 +83,7 @@ jobs:
     needs: unit-test
     steps:
       - name: Checkout code
-        uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871
       - name: Run golangci lint
         uses: golangci/golangci-lint-action@aaa42aa0628b4ae2578232a66b541047968fac86
         with: