added one small fix (eliminated space between package and imports in MaterialsDescription class

Author: Anirav Kareddy

src/main/java/software/amazon/encryption/s3/materials/MaterialsDescription.java

@@ -1,6 +1,5 @@
 // Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
 // SPDX-License-Identifier: Apache-2.0
-
 package software.amazon.encryption.s3.materials;
 
 import java.util.Collection;