docs: fix room type in tutorial (#1038)

packages/react-native-sdk/docusaurus/docs/reactnative/02-tutorials/01-video-calling.mdx

@@ -250,7 +250,7 @@ The following example illustrates how to create a call instance of the `default`
 Detailed information about various call types can be found in the [Call Types](../../core/configuring-call-types) guide.
 
 ```tsx
-const call = client.call('audio_room', callId);
+const call = client.call('default', callId);
 ```
 
 Subsequently, the `call.join` method can be utilized to enter the call identified by the given unique case-sensitive `callId`.