Content: Update Space config with app_file and friendly description

- Add app_file: index.html to HuggingFace Space config
- Update short_description to "Friendly Robot Companion"

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

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

README.md

@@ -4,8 +4,9 @@ emoji: 🗣️
 colorFrom: red
 colorTo: blue
 sdk: static
+app_file: index.html
 pinned: false
-short_description: Practice languages with Reachy Mini!
+short_description: Friendly Robot Companion
 tags:
  - reachy_mini
  - reachy_mini_python_app