Merge pull request kubernetes#2866 from ritazh/sig-auth-lead

Add sig-auth lead

Author: k8s-ci-robot

OWNERS_ALIASES

@@ -17,7 +17,7 @@ aliases:
     - enj
     - liggitt
     - mikedanese
-    - tallclair
+    - ritazh
   sig-autoscaling-leads:
     - gjtempleton
     - mwielgus