Merge pull request #2720 from mybatis/renovate/mysql-mysql-connector-java-8.x

Update dependency mysql:mysql-connector-java to v8.0.31

Author: hazendaz

pom.xml

@@ -262,7 +262,7 @@
     <dependency>
       <groupId>mysql</groupId>
       <artifactId>mysql-connector-java</artifactId>
-      <version>8.0.30</version>
+      <version>8.0.31</version>
       <scope>test</scope>
     </dependency>
     <dependency>