Fix user identity for rebase (#159)

Author: charleshofer

.github/workflows/rocm-open-upstream-pr.yml

@@ -17,6 +17,8 @@ jobs:
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683  # v4.2.2
       - name: Rebase code to main
         run: |
+          git config --global user.email "[email protected]"
+          git config --global user.name "Github Actions"
           git fetch
           git checkout -b $NEW_BRANCH_NAME origin/${{ github.head_ref }}
           git rebase --onto origin/main origin/rocm-main