Bump mysql-connector-java from 5.1.39 to 8.0.28

Bumps [mysql-connector-java](https://github.com/mysql/mysql-connector-j) from 5.1.39 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](mysql/mysql-connector-j@5.1.39...8.0.28)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -98,7 +98,7 @@
         <javax.validation.version>1.1.0.Final</javax.validation.version>
         <javax.el.version>3.0.1-b08</javax.el.version>
         <mybatis-spring-boot-starter.version>1.2.0</mybatis-spring-boot-starter.version>
-        <mysql-connector.java.version>5.1.39</mysql-connector.java.version>
+        <mysql-connector.java.version>8.0.28</mysql-connector.java.version>
         <kafka-clients.version>0.11.0.0</kafka-clients.version>
         <caffeine.version>2.5.5</caffeine.version>
         <spring-retry.version>1.2.1.RELEASE</spring-retry.version>