fixed auto contributors script to handle no changes in contributors

.github/workflows/auto-add-contributors.yml

@@ -39,16 +39,6 @@ jobs:
           python .github/workflows/contributors/update_contributors.py
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      - name: Committing changes to same branch
-        run: |
-          echo "Committing changes to same branch"
-          git config --global user.email "github-actions[bot]@users.noreply.github.com"
-          git config --global user.name "github-actions[bot]"
-          git add .all-contributorsrc
-          git commit -m " Update contributors from github action"
-          git push
-        env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       - name: Using all-contributors CLI to update files
         run: |
           echo "Using all-contributors CLI to update files"
@@ -57,5 +47,5 @@ jobs:
           git config --global user.email "github-actions[bot]@users.noreply.github.com"
           git config --global user.name "github-actions[bot]"
           git add -u
-          git commit -m "Update readme and contributors.qmd with contributors"
+          git diff-index --quiet HEAD || git commit -m "Update readme and contributors.qmd with contributors"
           git push