updates RN tracePropagationTargets

docs/platforms/react-native/configuration/options.mdx

@@ -267,7 +267,7 @@ The option may contain a list of strings or regex against which the URLs of outg
 If one of the entries in the list matches the URL of an outgoing request, trace data will be attached to that request.
 String entries do not have to be full matches, meaning the URL of a request is matched when it _contains_ a string provided through the option.
 
-If <PlatformIdentifier name="trace-propagation-targets" /> is not provided, trace data is attached to every outgoing request from the instrumented client.
+If <PlatformIdentifier name="trace-propagation-targets" /> is not provided, trace data is only attached to outgoing requests that contain `localhost` in their URL or requests whose URL starts with a `'/'` (for example `GET /api/v1/users`).
 
 </ConfigKey>