Use GITHUB_ACTOR in git config (#5009)

Author: vil02

.github/workflows/update_directory.yml

@@ -84,8 +84,8 @@ jobs:
       - name: Update DIRECTORY.md
         run: |
           cat DIRECTORY.md
-          git config --global user.name github-actions
-          git config --global user.email '${GITHUB_ACTOR}@users.noreply.github.com'
+          git config --global user.name "$GITHUB_ACTOR"
+          git config --global user.email "$[email protected]"
           git remote set-url origin https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/$GITHUB_REPOSITORY
           git add DIRECTORY.md
           git commit -am "Update directory" ||  true