CODEOWNERS: Become a typing code owner (#98480)

Author: AlexWaygood

.github/CODEOWNERS

@@ -135,7 +135,7 @@ Lib/ast.py                    @isidentical
 
 **/*idlelib*                  @terryjreedy
 
-**/*typing*                   @gvanrossum @Fidget-Spinner @JelleZijlstra
+**/*typing*                   @gvanrossum @Fidget-Spinner @JelleZijlstra @AlexWaygood
 
 **/*asyncore                  @giampaolo
 **/*asynchat                  @giampaolo