Merge pull request kubernetes#82051 from roycaihw/apiextensions/add-to-reviewers

add roycaihw to reviewers in apiextensions-apiserver

Author: k8s-ci-robot

staging/src/k8s.io/apiextensions-apiserver/OWNERS

@@ -12,5 +12,6 @@ reviewers:
 - yue9944882
 - logicalhan
 - jpbetz
+- roycaihw
 labels:
 - sig/api-machinery