Update regarding Flutter 3.38.0

[Kevin Chisholm]

Hi everyone,

We discovered that the Flutter 3.38 release was inadvertently built using a Dart beta version rather than the intended Dart stable release. 

We are actively working on a fix and will roll out a hotfix release shortly to correct this. You can track our progress on the GitHub issue here: https://github.com/flutter/flutter/issues/178400. 

Thanks for your patience while we get this sorted out!

- Kevin