added release notes

Author: rishika0212

packages/devtools_app/release_notes/NEXT_RELEASE_NOTES.md

@@ -27,7 +27,7 @@ TODO: Remove this section if there are not any updates.
 
 ## CPU profiler updates
 
-TODO: Remove this section if there are not any updates.
+- Fixed an issue where DevTools would auto-select the test runner isolate instead of the test suite isolate when connecting to a test run, causing CPU profiling and other tools to show no data (#9747). [#9747](https://github.com/flutter/devtools/pull/9747)
 
 ## Memory updates
 
@@ -69,4 +69,4 @@ TODO: Remove this section if there are not any updates.
 ## Full commit history
 
 To find a complete list of changes in this release, check out the
-[DevTools git log](https://github.com/flutter/devtools/tree/v2.57.0).
+[DevTools git log](https://github.com/flutter/devtools/tree/v2.57.0).