Update docker/build-push-action action to v6

Author: renovate[bot]

.github/workflows/docker.yml

@@ -19,7 +19,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Build and Push Docker Images
-        uses: docker/build-push-action@v1
+        uses: docker/build-push-action@v6
         with:
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_PASSWORD }}