feat: enable sticky comments for Claude Code review

Enable sticky comments to reuse the same comment thread on subsequent
pushes to the same PR, reducing comment clutter

Author: jamesbrink

.github/workflows/claude-code-review.yml

@@ -52,7 +52,7 @@ jobs:
             Be constructive and helpful in your feedback.
 
           # Optional: Use sticky comments to make Claude reuse the same comment on subsequent pushes to the same PR
-          # use_sticky_comment: true
+          use_sticky_comment: true
 
           # Optional: Customize review based on file types
           # direct_prompt: |