fix: incorrect dockerfile path for workloads pod

Author: HanFa

.github/workflows/easyvideotrans-workloads-release.yaml

@@ -28,5 +28,6 @@ jobs:
         uses: docker/build-push-action@v2
         with:
           context: .
+          file: Dockerfile-gpu-workload
           push: true
           tags: hanfa/easyvideotrans-workloads:latest