Apply suggestions from code review

Co-authored-by: Alex Krawiec <[email protected]>

Author: buenaflor

docs/platforms/dart/guides/flutter/troubleshooting.mdx

@@ -37,9 +37,9 @@ Building a Flutter app for a specific ABI using the `--target-platform` argument
 flutter build apk --target-platform=android-arm --split-per-abi
 ```
 
-## Running Sentry within an Isolate
+## Running Sentry Within an Isolate
 
-If you have a Sentry instance running within a separate [Isolate](https://dart.dev/language/isolates) you must execute `Sentry.close()` before the Isolate completes otherwise the Isolate won't shut down correctly.
+If you have a Sentry instance running within a separate [Isolate](https://dart.dev/language/isolates) you must execute `Sentry.close()` before the Isolate completes, otherwise the Isolate won't shut down correctly.
 
 ## Native Symbolication on Android