Upgrade GitHub Actions to latest versions

Signed-off-by: Salman Muin Kayser Chishti <13schishti@gmail.com>

.github/workflows/docker.yml

@@ -61,7 +61,7 @@ jobs:
             type=raw,value=latest-${{ matrix.suffix }},enable={{is_default_branch}}
 
       - name: Build and push Docker image
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           platforms: ${{ matrix.platform }}