update 修改jdk默认版本为17

pom.xml

@@ -17,7 +17,7 @@
         <spring-boot.version>3.2.3</spring-boot.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <java.version>21</java.version>
+        <java.version>17</java.version>
         <spring-boot.mybatis>3.0.3</spring-boot.mybatis>
         <springdoc.version>2.3.0</springdoc.version>
         <therapi-javadoc.version>0.15.0</therapi-javadoc.version>