Bump mysql-connector-java from 5.1.27 to 8.0.28

Bumps [mysql-connector-java](https://github.com/mysql/mysql-connector-j) from 5.1.27 to 8.0.28.
- [Release notes](https://github.com/mysql/mysql-connector-j/releases)
- [Changelog](https://github.com/mysql/mysql-connector-j/blob/release/8.0/CHANGES)
- [Commits](https://github.com/mysql/mysql-connector-j/compare/5.1.27...8.0.28)

---
updated-dependencies:
- dependency-name: mysql:mysql-connector-java
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -24,7 +24,7 @@
 		<commons-pool.version>1.6</commons-pool.version>
 		<druid.version>1.1.9</druid.version>
 		<!-- mysql -->
-        <mysql.version>5.1.27</mysql.version>
+        <mysql.version>8.0.28</mysql.version>
         <!-- sqlserver 2008 -->
         <sqlserver.version>4.0</sqlserver.version>
         <!-- oracle 11g -->