Changelog and readme.txt edits. (#35858)

Author: haqadn

projects/plugins/boost/CHANGELOG.md

@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Speed Scores: Added support for annotating points of time in the speed score history graph. [#34978]
 
 ### Changed
+- Image Guide: Removed beta flag [#35846]
 - General: Better error handling for invalid data when running wp-admin pages. [#35361]
 - General: Improved error handling with ErrorBoundary around SpeedScore and Module components. [#35543]
 - General: Indicate compatibility with the upcoming version of WordPress, 6.5. [#35820]

projects/plugins/boost/changelog/boost-fix-cache-loud-notice

@@ -187,6 +187,7 @@ If you run into compatibility issues, please do let us know. You can drop us a l
 - Speed Scores: Added support for annotating points of time in the speed score history graph.
 
 #### Changed
+- Image Guide: Removed beta flag
 - General: Better error handling for invalid data when running wp-admin pages.
 - General: Improved error handling with ErrorBoundary around SpeedScore and Module components.
 - General: Indicate compatibility with the upcoming version of WordPress, 6.5.