Update TURN server configuration to use UDP transport

Added ?transport=udp parameter to TURN server URL for improved connectivity.

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

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

src/App.jsx

@@ -10,7 +10,7 @@ const RTC_CONFIG = {
       urls: ["stun:stun.ronde.vu:3478"]
     },
     {
-      urls: ["turn:turn.ronde.vu:3478"],
+      urls: ["turn:turn.ronde.vu:3478?transport=udp"],
       username: "webrtcuser",
       credential: "supersecretpassword"
     }