Add info about xcode cloud source maps uploads (#6488)

Author: krystofwoldrich

src/platforms/react-native/troubleshooting.mdx

@@ -171,6 +171,14 @@ If you're using `React Navigation 5` and you're not receiving transactions anymo
 
 If you experience mismatched line numbers on [sentry.io](https://sentry.io) when using RAM Bundles, this is due to a [bug](https://github.com/facebook/metro/issues/399) on the Metro tooling.
 
+## Uploading source maps from Xcode Could
+
+The Xcode integration reads `dist` from `CFBundleVersion` but Xcode Cloud builds use `CI_BUILD_NUMBER` variable. Add the following code to `Bundle React Native code and images` build phase to enable correct source maps uploads. 
+
+```
+export SENTRY_DIST=$CI_BUILD_NUMBER
+```
+
 ## Set Up SKD v4 With React Native 0.69 or Higher
 
 To install an older version of the `@sentry/react-native`, you'll need to specify it in the install command. Similarly, you'll need to use a compatible `@sentry/wizard`, as shown in the script below.