优化了backend 后端的目录结构

backend/src/test/java/com/aisi/newsclassifier/NewsClassifierApplicationTests.java

@@ -1,10 +1,10 @@
-package com.aisi.chery;
+package com.aisi.newsclassifier;
 
 import org.junit.jupiter.api.Test;
 import org.springframework.boot.test.context.SpringBootTest;
 
 @SpringBootTest
-class CheryApplicationTests {
+class NewsClassifierApplicationTests {
 
     @Test
     void contextLoads() {