fix(deps): update dependency mysql:mysql-connector-java to v8

Author: renovate[bot]

pom.xml

@@ -90,7 +90,7 @@
         <jackson.modules>2.16.0</jackson.modules>
 
         <!-- database -->
-        <mysql.version>5.1.49</mysql.version>
+        <mysql.version>8.0.33</mysql.version>
         <druid.version>1.2.20</druid.version>
         <mybatis.plus.version>3.5.4.1</mybatis.plus.version>
         <mybatis.spring.boot.version>2.2.2</mybatis.spring.boot.version>