Bump docker/build-push-action from 2 to 5

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 2 to 5.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v2...v5)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/tests.yml

@@ -51,7 +51,7 @@ jobs:
       # Test container build for all supported platforms (defined above)
       -
         name: Test Build ${{ matrix.docker-platform }}
-        uses: docker/build-push-action@v2
+        uses: docker/build-push-action@v5
         with:
           context: .
           file: ./Dockerfile