new workflow

.github/workflows/auto-comment.yaml

@@ -0,0 +1,22 @@
+name: Automatic PR Comment
+
+on:
+  pull_request_target:
+    types: [opened, synchronize]
+
+jobs:
+  comment:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Comment on PR
+        uses: actions/github-script@v6
+        with:
+          script: |
+            const issue_number = context.payload.pull_request.number;
+            const repo = context.repo;
+            const commentBody = `Hello, thank you for your contribution. If you are a participant, please close this pull request and open it in your own forked repository instead of here. Please read the instructions on your onboarding [Assignment Submission Guide](https://github.com/UofT-DSI/onboarding/blob/main/onboarding_documents/submissions.md) more carefully. If you are not a participant, please give us up to 72 hours to review your PR. Alternatively, you can reach out to us directly to expedite the review process.`;
+            github.issues.createComment({
+              ...repo,
+              issue_number: issue_number,
+              body: commentBody
+            });