Update CODEOWNERS to include @rogergzou (#1504)

Author: robga

.github/CODEOWNERS

@@ -5,7 +5,7 @@
 # These owners will be the default owners for everything in
 # the repo. Unless a later match takes precedence,
 # below owners will be requested for review when someone opens a pull request.
-*    @robga @hanheuljo @cemheren @gokmen-msft @calecarter @varshaj-github
+*    @robga @rogergzou @hanheuljo @cemheren @gokmen-msft @calecarter @varshaj-github
 
 # Order is important; the last matching pattern takes the most
 # precedence. When someone opens a pull request that only