Fix .git-blame-ignore-revs.

Author: felixfontein

.git-blame-ignore-revs

@@ -1,3 +1,7 @@
+# Copyright (c) Ansible Project
+# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 # YAML reformatting
 2b4882549908b5b1fafe5fa10efb47f613a71f94
 8196cacff8e83dc5d7fb88b43ef3cab5d3751c39