Update kep.yaml

Author: drbugfinder-work

keps/sig-apps/2255-pod-cost/kep.yaml

@@ -9,13 +9,11 @@ participating-sigs:
 status: provisional
 creation-date: 2021-01-12
 reviewers:
-  - @ahg-g
-  - @janetkuo
-  - @alculquicondor
+  - "@ahg-g"
+  - "@janetkuo"
+  - "@alculquicondor"
 approvers:
-  - @janetkuo
-prr-approvers:
-  - @janetkuo
+  - "@janetkuo"
 see-also:
   - https://github.com/kubernetes/kubernetes/issues/45509
   - https://github.com/kubernetes/enhancements/issues/2255