chore: add required copyright headers

hashicorp-copywrite[bot] · xiehan · commit bb60357042a3 · 2024-08-28T16:31:53.000+02:00
Signed-off-by: hashicorp-copywrite[bot] &lt;110428419+hashicorp-copywrite[bot]@users.noreply.github.com&gt;
diff --git a/.github/dependency-review-config.yml b/.github/dependency-review-config.yml
@@ -1,3 +1,6 @@
+# Copyright (c) HashiCorp, Inc.
+# SPDX-License-Identifier: MPL-2.0
+
 comment_summary_in_pr: on-failure
 vulnerability_check: false
 license_check: true
