Update metro.mdx

Author: krystofwoldrich

docs/platforms/react-native/manual-setup/metro.mdx

@@ -34,7 +34,7 @@ module.exports = withSentryConfig(config);
 const { getSentryExpoConfig } = require("@sentry/react-native/metro");
 
 // const config = getDefaultConfig(__dirname);
-const config = getSentryExpoConfig(config, {});
+const config = getSentryExpoConfig(__dirname);
 ```
 
 ### Wrap Your Custom Serializer