fix javadoc warning

src/main/java/com/imyeyu/spring/config/AbstractRedisConfig.java

@@ -21,6 +21,12 @@ import java.time.Duration;
  * @version 2021-11-21 10:00
  */
 public abstract class AbstractRedisConfig implements CachingConfigurer {
+
+	/**
+	 * 创建 Redis 配置
+	 */
+	protected AbstractRedisConfig() {
+	}
 	
 	/**
 	 * 构建 Redis 基本配置