Update required Flutter version

Author: buenaflor

docs/platforms/dart/guides/flutter/session-replay/index.mdx

@@ -18,12 +18,12 @@ By default, our Session Replay SDK masks all text content, images, and user inpu
 
 ## Pre-requisites
 
-Make sure your Sentry Flutter SDK version is at least 8.9.0, which is required for Session Replay.
+Make sure your Sentry Flutter SDK version is at least `9.0.0`, which is required for Session Replay.
 You can update your `pubspec.yaml` to the matching version:
 
 ```yaml
 dependencies:
-  sentry_flutter: ^8.9.0
+  sentry_flutter: ^9.0.0
 ```
 
 ## Setup