#13196, #13213: Fix test on windows to close file so it can be deleted after test run

lucene/core/src/test/org/apache/lucene/store/TestMMapDirectory.java

@@ -109,10 +109,11 @@ public class TestMMapDirectory extends BaseDirectoryTestCase {
         out.writeBytes(bytes, 0, bytes.length);
       }
 
-      final IndexInput in = dir.openInput("test", IOContext.RANDOM);
+      try (final IndexInput in = dir.openInput("test", IOContext.RANDOM)) {
         final byte[] readBytes = new byte[size];
         in.readBytes(readBytes, 0, readBytes.length);
         assertArrayEquals(bytes, readBytes);
       }
     }
   }
+}