feat: add synchronize trigger to continue-general-review workflow

Added `synchronize` to pull_request event types so the workflow
runs on every push to the PR, not just when opened or marked ready.

This enables testing of the GitHub App authentication feature.

Generated with [Continue](https://continue.dev)

Co-Authored-By: Continue <[email protected]>

Author: bdougie

.github/workflows/continue-general-review.yaml

@@ -5,7 +5,7 @@ on:
     branches:
       - main
   pull_request:
-    types: [opened, ready_for_review]
+    types: [opened, ready_for_review, synchronize]
   issue_comment:
     types: [created]