Update greetings.yml

Author: sudo-dpkg

.github/workflows/greetings.yml

@@ -22,5 +22,8 @@ jobs:
       - name: Congratulate on PR Merge
         if: github.event.action == 'closed' && github.event.pull_request.merged == true
         run: |
-          echo "🎉 Congratulations @${{ github.event.pull_request.user.login }}! Your PR has been merged!"
-          echo "⭐ If you enjoyed contributing, please consider giving us a star on GitHub and following us for updates!"
+          curl -X POST \
+            -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
+            -H "Accept: application/vnd.github.v3+json" \
+            https://api.github.com/repos/${{ github.repository }}/issues/${{ github.event.pull_request.number }}/comments \
+            -d '{"body": "🎉 Congratulations @'${{ github.event.pull_request.user.login }}'! Your PR has been merged! ⭐ If you enjoyed contributing, please consider giving us a star on GitHub and following us for updates!"}'