code review fixes

Author: lobsterkatie

src/platforms/common/configuration/options.mdx

@@ -356,7 +356,9 @@ Sentry SDKs normalize any contextual data to a given depth. Any data beyond this
 
 </ConfigKey>
 
-<ConfigKey name="normalize-max-breadth" supported={["javascript", "node"]}>
+<ConfigKey name="normalize-max-breadth" supported={["javascript", "node"]} notSupported={["react-native", "electron"]}>
+
+_(New in version 6.19.1)_
 
 This is the maximum number of properties or entries that will be included in any given object or array when the SDK is normalizing contextual data. Any data beyond this depth will be dropped. (defaults to 1000)