Fix CODEOWNERS error (#10127)

<img width="681" height="323" alt="Screenshot 2025-09-25 at 2 28 16 PM" src="https://github.com/user-attachments/assets/e148707e-8af1-49cf-a2de-74fec52ed973" />

Author: jmagman

CODEOWNERS

@@ -6,8 +6,8 @@
 
 packages/animations/**                                   @hannah-hyj
 packages/camera/**                                       @bparrishMines
-packages/cross_file/**                                   @stuartmorgan
-packages/extension_google_sign_in_as_googleapis_auth/**  @stuartmorgan
+packages/cross_file/**                                   @stuartmorgan-g
+packages/extension_google_sign_in_as_googleapis_auth/**  @stuartmorgan-g
 packages/file_selector/**                                @stuartmorgan-g
 packages/flutter_lints/**                                @chunhtai
 packages/flutter_template_images/**                      @stuartmorgan-g