keps/sig-cli: 2206 status: implementable

Looking through history, consensus seemed to be that implemented status
is reserved for KEPs that have `stage: stable`, so this should remain at
implementable

Author: spiffxp

keps/sig-cli/2206-openapi-features-in-kustomize/kep.yaml

@@ -13,7 +13,7 @@ approvers:
   - "@pwittrock"
 creation-date: 2020-12-21
 last-updated: 2020-01-15
-status: implemented
+status: implementable
 
 latest-milestone: "1.22"
 stage: "beta"