Merge pull request #2152 from zheng1/fix_owners

Update network OWNERS files

pkg/controller/network/OWNERS

 approvers:
-    - magicsong
-    - zryfish
     - zheng1
+    - zryfish
 
 reviewers:
-    - magicsong
     - zheng1
     - zryfish
 

pkg/kapis/network/OWNERS

+approvers:
+    - zheng1
+    - zryfish
+
+reviewers:
+    - zheng1
+    - zryfish
+
+labels:
+    - area/controller
+    - area/networking
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