build: bump docker/build-push-action from 5 to 6 (#496)

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

.github/workflows/build.yml

@@ -54,7 +54,7 @@ jobs:
       uses: docker/setup-buildx-action@v3
 
     - name: Build and push
-      uses: docker/build-push-action@v5
+      uses: docker/build-push-action@v6
       with:
         context: .
         push: ${{ !github.event.pull_request.head.repo.fork && github.actor != 'dependabot[bot]' }}