Merge branch 'doc-cs-codeowners' into 'master'

Technical writing codeowner for container security

See merge request gitlab-org/gitlab!69592

.gitlab/CODEOWNERS

@@ -46,6 +46,8 @@
 /doc/update/ @axil @marcia
 /doc/user/analytics/ @msedlakjakubowski @ngaskill
 /doc/user/application_security/ @rdickenson
+/doc/user/application_security/container_scanning/ @ngaskill
+/doc/user/application_security/cluster_image_scanning/ @ngaskill
 /doc/user/clusters/ @marcia
 /doc/user/compliance/ @rdickenson @eread
 /doc/user/group/ @msedlakjakubowski