Update test-mlperf-inference-resnet50.yml

Author: arjunsuresh

.github/workflows/test-mlperf-inference-resnet50.yml

@@ -74,4 +74,4 @@ jobs:
       run: |
         git config --global user.name mlcommons-bot
         git config --global user.email "mlcommons-bot@users.noreply.github.com"
-        cm run script --tags=push,github,mlperf,inference,submission --env.CM_GITHUB_PAT=PAT --repo_url=https://github.com/mlcommons/mlperf_inference_test_submissions_v5.0 --repo_branch=auto-update --commit_message="Results from R50 GH action on ${{ matrix.os }}" --quiet
+        cm run script --tags=push,github,mlperf,inference,submission --env.CM_GITHUB_PAT=$PAT --repo_url=https://github.com/mlcommons/mlperf_inference_test_submissions_v5.0 --repo_branch=auto-update --commit_message="Results from R50 GH action on ${{ matrix.os }}" --quiet