Bump docker/build-push-action from 5 to 6 (#397)

Author: cleverchuk

.github/workflows/release.yml

@@ -479,7 +479,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Build and push
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           push: true
           context: agent