Fix errors with Twilio realtime example app

Author: seratch

examples/realtime-twilio/index.ts

@@ -62,11 +62,9 @@ const agent = new RealtimeAgent({
   instructions:
     'You are a friendly assistant. When you use a tool always first say what you are about to do.',
   tools: [
-    hostedMcpTool({
-      serverLabel: 'dnd',
-    }),
     hostedMcpTool({
       serverLabel: 'deepwiki',
+      serverUrl: 'https://mcp.deepwiki.com/sse',
     }),
     secretTool,
     weatherTool,