schema: add missing Copyright header (#263)

dbanck · web-flow · commit a638ff79984b · 2023-04-18T14:11:58.000+02:00
diff --git a/schema/constraint_literal_type_test.go b/schema/constraint_literal_type_test.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
 package schema
 
 import (
