update code examples

Author: whoiskatrin

src/content/docs/sandbox/api/ports.mdx

@@ -103,7 +103,7 @@ const response = await connect(sandbox: Sandbox, request: Request, port: number)
 **Returns**: `Promise<Response>` - WebSocket response establishing the connection
 
 <TypeScriptExample>
-```
+```ts
 import { getSandbox, connect, type Sandbox } from "@cloudflare/sandbox";
 
 export { Sandbox } from "@cloudflare/sandbox";