Delete extra blank lines

hippo4j-example/hippo4j-config-nacos-spring-boot-starter-example/src/main/java/cn/hippo4j/example/config/nacos/ConfigNacosExampleApplication.java

@@ -28,5 +28,4 @@ public class ConfigNacosExampleApplication {
     public static void main(String[] args) {
         SpringApplication.run(ConfigNacosExampleApplication.class, args);
     }
-
 }