⬆️ Bump docker/build-push-action from 5 to 6

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 5 to 6.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v5...v6)

---
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/docker.yml

@@ -41,7 +41,7 @@ jobs:
         password: ${{ secrets.DOCKERHUB_TOKEN }}
 
     - name: Docker Build & Push (version tag)
-      uses: docker/build-push-action@v5
+      uses: docker/build-push-action@v6
       with:
         context: ${{ matrix.context }}
         tags: ${{ matrix.base }}:${{ env.DOCKER_TAG_NAME }}
@@ -51,7 +51,7 @@ jobs:
     - name: Docker Build & Push (latest tag)
       if: |
           (github.event_name == 'release' && ! github.event.release.prerelease)
-      uses: docker/build-push-action@v5
+      uses: docker/build-push-action@v6
       with:
         context: ${{ matrix.context }}
         tags: ${{ matrix.base }}:latest