Make reuse compliant

gradlew

@@ -1,20 +1,9 @@
 #!/bin/sh
 
-#
 # Copyright © 2015-2021 the original authors.
+# SPDX-FileCopyrightText: 2023 Gradle, Inc.
 #
-# 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
-#
-#      https://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.
-#
+# SPDX-License-Identifier: Apache-2.0
 
 ##############################################################################
 #