netlify.yaml: add some debugging

.github/workflows/netlify.yaml

@@ -17,6 +17,10 @@ jobs:
     runs-on: ubuntu-latest
     if: github.event.workflow_run.conclusion == 'success' && github.event.workflow_run.event == 'pull_request'
     steps:
+      - name: "dump context data"
+        run: |
+          jq . < $GITHUB_EVENT_PATH
+          
       - name: "🔍 Read PR number"
         id: readctx
         run: |