Moving to More Efficient Windows GPU Runner (#3587)

Summary: Pull Request resolved: https://github.com/pytorch/audio/pull/3587

Reviewed By: huydhn

Differential Revision: D48847224

Pulled By: osalpekar

fbshipit-source-id: 15ccae56f0e5e8e366b5feb66fdb42bb5cba97e1

.github/workflows/unittest-windows-gpu.yml

@@ -14,7 +14,7 @@ jobs:
     uses: pytorch/test-infra/.github/workflows/windows_job.yml@main
     with:
       repository: pytorch/audio
-      runner: windows.8xlarge.nvidia.gpu
+      runner: windows.g5.4xlarge.nvidia.gpu
       timeout: 360
       script: |
         # Mark Build Directory Safe