Add copyright

hanjm · hanjm · commit 49d1ca989e5a · 2021-07-25T12:27:17.000+08:00
Signed-off-by: hanjm &lt;hanjinming@outlook.com&gt;
diff --git a/pkg/objstore/cos/cos_test.go b/pkg/objstore/cos/cos_test.go
@@ -1,3 +1,6 @@
+// Copyright (c) The Thanos Authors.
+// Licensed under the Apache License 2.0.
+
 package cos
 
 import (
