cri: fix using the pinned label to pin image

Signed-off-by: Iceber Gu <wei.cai-nat@daocloud.io>

pkg/cri/store/image/image.go

@@ -213,6 +213,7 @@ func (s *store) add(img Image) error {
 	}
 	// Or else, merge and sort the references.
 	i.References = docker.Sort(util.MergeStringSlices(i.References, img.References))
+	i.Pinned = i.Pinned || img.Pinned
 	s.images[img.ID] = i
 	return nil
 }