Fix golint issue

Signed-off-by: Guangwen Feng <fenggw-fnst@cn.fujitsu.com>

internal/experimental/registry/client_opts.go

@@ -61,7 +61,7 @@ func ClientOptCache(cache *Cache) ClientOption {
 	}
 }
 
-// ClientOptCache returns a function that sets the cache setting on a client options set
+// ClientOptCredentialsFile returns a function that sets the cache setting on a client options set
 func ClientOptCredentialsFile(credentialsFile string) ClientOption {
 	return func(client *Client) {
 		client.credentialsFile = credentialsFile