Merge pull request kubernetes#1947 from AndiLi99/master

Change k8s.io to kubernetes.io in the label key for invalid objects.

Author: k8s-ci-robot

keps/sig-storage/177-volume-snapshot/tighten-validation-webhook-crd.md

@@ -302,7 +302,7 @@ kind: VolumeSnapshot
 metadata:
   name: snapshot-label-example
   labels:
-    snapshot.storage.sigs.k8s.io/invalid-snapshot-resource: "" # Label applied for invalid VolumeSnapshot objects
+    snapshot.storage.kubernetes.io/invalid-snapshot-resource: "" # Label applied for invalid VolumeSnapshot objects
 ...
 ```
 
@@ -313,7 +313,7 @@ kind: VolumeSnapshotContent
 metadata:
   name: snapcontent-72d9a349-aacd-42d2-a240-d775650d2455
   labels:
-    snapshot.storage.sigs.k8s.io/invalid-snapshot-content-resource: "" # Label applied for invalid VolumeSnapshotContent objects
+    snapshot.storage.kubernetes.io/invalid-snapshot-content-resource: "" # Label applied for invalid VolumeSnapshotContent objects
 ...
 ```