Bump docker/build-push-action from 5.3.0 to 5.4.0 (#101)

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 5.3.0 to 5.4.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v5.3.0...v5.4.0)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  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>

.github/workflows/ci-build.yml

@@ -22,7 +22,7 @@ jobs:
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Build and push Docker images
-        uses: docker/build-push-action@v5.3.0
+        uses: docker/build-push-action@v5.4.0
         with:
           tags: ghcr.io/beryju/oauth1-test-server:latest
           push: ${{ github.ref == 'refs/heads/main' }}

.github/workflows/ci-tag.yml

@@ -21,7 +21,7 @@ jobs:
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Build and push Docker images
-        uses: docker/build-push-action@v5.3.0
+        uses: docker/build-push-action@v5.4.0
         with:
           tags: ghcr.io/beryju/oauth1-test-server:${{github.ref_name}}
           platforms: linux/amd64,linux/arm64