ci: check license headers (#2076)

Based on the same workflow in Lance.

java/core/src/main/java/com/lancedb/lancedb/Connection.java

@@ -1,16 +1,5 @@
-/*
- * 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.
- */
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: Copyright The LanceDB Authors
 
 package com.lancedb.lancedb;
 
@@ -117,4 +106,4 @@ public class Connection implements Closeable {
   private native void releaseNativeConnection(long handle);
 
   private Connection() {}
-}
+}

java/core/src/test/java/com/lancedb/lancedb/ConnectionTest.java

@@ -1,16 +1,5 @@
-/*
- * 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.
- */
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: Copyright The LanceDB Authors
 package com.lancedb.lancedb;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;