Update test-mlperf-inference-resnet50.yml

Author: arjunsuresh

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

@@ -70,6 +70,7 @@ jobs:
         GITHUB_TOKEN: ${{ env.PAT }}
       if: github.repository_owner == 'mlcommons'
       run: |
+        export GITHUB_TOKEN=${{ env.PAT }}
         git config --global user.name "mlcommons-bot"
         git config --global user.email "mlcommons-bot@users.noreply.github.com"
         git config --global credential.https://github.com.helper ""