Add mengqiy to milestone maintainer

Author: mengqiy

config/kubernetes/sig-release/teams.yaml

@@ -84,6 +84,7 @@ teams:
     - marosset # Windows
     - mbianchidev # v1.34 Branch Manager
     - mborsz # Scalability
+    - mengqiy # Scalability
     - micahhausler # Auth
     - michelle192837 # Testing
     - michellengnx # 1.34 Docs Lead