perf($POM): update MyBatis Plus version to 3.4.3.4

https://github.com/baomidou/mybatis-plus/blob/3.0/CHANGELOG.md#v3434-20210922

pom.xml

@@ -50,7 +50,7 @@
         <spring-boot-admin-starter-server.version>2.5.1</spring-boot-admin-starter-server.version>
         <spring-boot-admin-starter-client.version>2.5.1</spring-boot-admin-starter-client.version>
         <druid-spring-boot-starter.version>1.2.6</druid-spring-boot-starter.version>
-        <mybatis-plus-boot-starter.version>3.4.3.3</mybatis-plus-boot-starter.version>
+        <mybatis-plus-boot-starter.version>3.4.3.4</mybatis-plus-boot-starter.version>
         <dynamic-datasource-spring-boot-starter.version>3.4.1</dynamic-datasource-spring-boot-starter.version>
         <hutool-all.version>5.7.12</hutool-all.version>
         <guava.version>30.1.1-jre</guava.version>