fix up har->jar

Author: rootphantomer

pom.xml

@@ -4,7 +4,7 @@
   <groupId>org.example</groupId>
   <artifactId>qiushui</artifactId>
   <version>1.0-SNAPSHOT</version>
-  <packaging>har</packaging>
+  <packaging>jar</packaging>
   <properties>
     <!-- 指定jdk版本 -->
     <java.version>1.8</java.version>