Emphasize the supported platforms on the product page (#5478)

Co-authored-by: jernejstrasner <jernejstrasner@users.noreply.github.com>

Author: jernejstrasner

src/docs/product/profiling/index.mdx

@@ -10,6 +10,11 @@ description: "Sentry Profiling is the next-generation performance monitoring pla
 
 Profiling is currently in beta. Beta features are still in-progress and may have bugs. We recognize the irony. For access, contact us at [profiling@sentry.io](mailto:profiling@sentry.io).
 
+**The currently supported platforms are:**
+
+  * Android (Java and Kotlin only)
+  * iOS (Swift and Objective-C only)
+
 </Note>
 
 Profiling allows you to collect and analyze performance profiles from real user devices in production to give you a complete picture of how your application performs in a variety of environments. It's the next-generation performance monitoring feature for your apps, removing the limitations of manually created tests, by looking at real user experiences. With profiling, you're building in [performance as a feature](https://blog.codinghorror.com/performance-is-a-feature/) from day one.