Change code owners from classroom-reviewers to stabilize-reviewers

Author: adrianTJenkins

CODEOWNERS

@@ -1,4 +1,4 @@
 # For more information, see [docs](https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners#codeowners-syntax)
 
 # This repository is maintained by:
-* @github/classroom-reviewers
+* @github/stabilize-reviewers