chore: comment on pr

.github/workflows/why.yml

@@ -0,0 +1,24 @@
+name: Some workflow
+
+on:
+  issue_comment:
+    types: [created]
+
+jobs:
+  comment:
+    if: contains(github.event.comment.body, 'why')
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Add comment to PR
+        env:
+          URL: ${{ github.event.issue.comments_url }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          curl \
+            -X POST \
+            $URL \
+            -H "Content-Type: application/json" \
+            -H "Authorization: token $GITHUB_TOKEN" \
+            --data '{ "body": "blah blah" }'