Bump actions/checkout from 3 to 4 (#110)

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] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/build-docker.yml

@@ -40,7 +40,7 @@ jobs:
           base-image: library/nginx:mainline-alpine
           image: ${{ steps.variables.outputs.image }}
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         if: ${{ steps.update.outputs.needs-updating == 'true' }}
       - name: Setup QEMU
         uses: docker/setup-qemu-action@v2

.github/workflows/codeql-analysis.yml

@@ -37,7 +37,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL