Revert to Gradio SDK version 5.42.0

Version 6.0.1 caused errors. Reverting to stable 5.42.0.

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

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

README.md

@@ -4,7 +4,7 @@ emoji: 🎮
 colorFrom: purple
 colorTo: blue
 sdk: gradio
-sdk_version: 6.0.1
+sdk_version: 5.42.0
 app_file: app.py
 pinned: false
 tags: