Merge pull request #42041 from yu-song/close-file-handle

Automatic merge from submit-queue

Add f.close for the opend file

pkg/kubectl/cmd/util/cached_discovery.go

@@ -141,6 +141,7 @@ func (d *CachedDiscoveryClient) getCachedFile(filename string) ([]byte, error) {
 	if err != nil {
 		return nil, err
 	}
+	defer file.Close()
 
 	fileInfo, err := file.Stat()
 	if err != nil {