Updating the docs to reflect the actual implementation (#10276)

Author: AhmedAlaa4611

Diff for: broadcasting.md

@@ -186,8 +186,8 @@ window.Echo = new Echo({
     broadcaster: 'reverb',
     key: import.meta.env.VITE_REVERB_APP_KEY,
     wsHost: import.meta.env.VITE_REVERB_HOST,
-    wsPort: import.meta.env.VITE_REVERB_PORT,
-    wssPort: import.meta.env.VITE_REVERB_PORT,
+    wsPort: import.meta.env.VITE_REVERB_PORT ?? 80,
+    wssPort: import.meta.env.VITE_REVERB_PORT ?? 443,
     forceTLS: (import.meta.env.VITE_REVERB_SCHEME ?? 'https') === 'https',
     enabledTransports: ['ws', 'wss'],
 });