Add missing @author tag to DefaultSetOperations

Signed-off-by: Kiminni <imk0980@gmail.com>

Author: Kiminni

src/main/java/org/springframework/data/redis/core/DefaultSetOperations.java

@@ -33,6 +33,7 @@
  * @author Christoph Strobl
  * @author Mark Paluch
  * @author Roman Bezpalko
+ * @author Mingi Lee
  */
 class DefaultSetOperations<K, V> extends AbstractOperations<K, V> implements SetOperations<K, V> {