Add issue close event trigger to log-issue-events workflow

Updates the GitHub workflow to also trigger when issues are closed,
expanding event tracking beyond just issue creation.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.github/workflows/log-issue-events.yml

@@ -2,7 +2,7 @@ name: Log Issue Events to Statsig
 
 on:
   issues:
-    types: [opened]
+    types: [opened, closed]
 
 jobs:
   log-to-statsig: