Update some copyright headers

fastlane/changelog.rb

@@ -1,6 +1,18 @@
-# Copyright 2020 New Vector Ltd - All Rights Reserved
-# Unauthorized copying of this file, via any medium is strictly prohibited
-# Proprietary and confidential
+#
+# Copyright 2020 New Vector Ltd
+#
+# 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.
+#
 
 # frozen_string_literal: true