Merge pull request kubernetes#1627 from apelisse/patch-1

Mark kubectl-diff as implemented

Author: k8s-ci-robot

keps/sig-cli/20200115-kubectl-diff.md

@@ -12,8 +12,8 @@ approvers:
   - TBD
 editor: TBD
 creation-date: 2020-01-15
-last-updated: 2020-01-27
-status: implementable
+last-updated: 2020-03-23
+status: implemented
 see-also:
   - "/keps/sig-api-machinery/0015-dry-run.md"
   - "/keps/sig-api-machinery/0006-apply.md"