Bump mysql-connector-java from 8.0.12 to 8.0.16 in /sbmp-multidb

Bumps [mysql-connector-java](https://github.com/mysql/mysql-connector-j) from 8.0.12 to 8.0.16.
- [Release notes](https://github.com/mysql/mysql-connector-j/releases)
- [Changelog](https://github.com/mysql/mysql-connector-j/blob/release/8.0/CHANGES)
- [Commits](mysql/mysql-connector-j@8.0.12...8.0.16)

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

Author: dependabot[bot]

Diff for: sbmp-multidb/pom.xml

@@ -19,7 +19,7 @@
     <description>Demo project for Spring Boot</description>
 
     <properties>
-        <mysql.version>8.0.12</mysql.version>
+        <mysql.version>8.0.16</mysql.version>
         <mybatisplus.version>3.0.7.1</mybatisplus.version>
         <dynamic-datasource.version>2.5.0</dynamic-datasource.version>
     </properties>