Update rondevu-client to v0.7.3

Fixed answerer authorization for ICE candidates:
- Answer is now sent to server BEFORE setLocalDescription
- This ensures answererPeerId is registered before ICE candidates arrive
- Fixes 403 Forbidden errors when answerer sends candidates

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

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

package.json

@@ -10,7 +10,7 @@
     "deploy": "npm run build && npx wrangler pages deploy dist --project-name=rondevu-demo"
   },
   "dependencies": {
-    "@xtr-dev/rondevu-client": "^0.7.2",
+    "@xtr-dev/rondevu-client": "^0.7.3",
     "@zxing/library": "^0.21.3",
     "qrcode": "^1.5.4",
     "react": "^18.2.0",