ci: bump actions/checkout from 3 to 4 (#345)

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](actions/checkout@v3...v4)

---
updated-dependencies:
- dependency-name: actions/checkout
  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.yml

@@ -25,7 +25,7 @@ jobs:
       backend_dir_name: ${{ matrix.backend_dir_name }}
       backend_tag_name: ${{ matrix.backend_tag_name }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           ref: "${{ env.GITHUB_SHA }}"
           fetch-depth: 0

.github/workflows/tests.yml

@@ -60,7 +60,7 @@ jobs:
           echo "BRANCH_NAME=$(echo ${GITHUB_HEAD_REF})" >> $GITHUB_ENV
 
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: "${{ env.GITHUB_SHA }}"
 
@@ -145,7 +145,7 @@ jobs:
           echo "BASE_REF_NAME=${{ github.event.pull_request.base.sha }}" >> $GITHUB_ENV
 
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: "${{ env.GITHUB_SHA }}"
           fetch-depth: 0