Add missing @Override annotation to GenericJackson2JsonRedisSerializer.useForType.

This fixes an issue where the `useForType` method in
GenericJackson2JsonRedisSerializer did not have the `@Override`
annotation, making it less clear that it overrides a method
from DefaultTypeResolverBuilder.

Closes #3053
Original pull request: #3058

src/main/java/org/springframework/data/redis/serializer/GenericJackson2JsonRedisSerializer.java

@@ -636,6 +636,7 @@ public class GenericJackson2JsonRedisSerializer implements RedisSerializer<Objec
 		 * Boolean, Integer, Double) will never use typing; that is both due to them being concrete and final, and since
 		 * actual serializers and deserializers will also ignore any attempts to enforce typing.
 		 */
+		@Override
 		public boolean useForType(JavaType javaType) {
 
 			if (javaType.isJavaLangObject()) {