Update license to the current version from gapic generator template.

Author: chalmerlowe

storage/cloudbuild/zb-system-tests-cloudbuild.yaml

@@ -1,6 +1,6 @@
-# Copyright 2026 Google Inc. All Rights Reserved.
+# Copyright 2026 Google LLC
 #
-# Licensed under the Apache License, Version 2.0 (the 'License');
+# Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
@@ -11,6 +11,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+#
 
 substitutions:
   _REGION: "us-central1"