Add missing ASL (license) to GitHub Actions

.github/workflows/ci.yml

@@ -1,4 +1,4 @@
-# Copyright 2020 The Error Prone Authors.
+# Copyright 2020 The Google Java Format Authors
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

.github/workflows/release.yml

@@ -1,3 +1,17 @@
+# Copyright 2020 The Google Java Format Authors
+#
+# 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
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# 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.
+
 name: Release google-java-format
 
 on: