Bump mysql-connector-java from 5.1.47 to 8.0.28 in /frameworks/Java/act (#7437)

Bumps [mysql-connector-java](https://github.com/mysql/mysql-connector-j) from 5.1.47 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/5.1.47...8.0.28)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

frameworks/Java/act/pom.xml

@@ -69,7 +69,7 @@
 
   <properties>
     <java.version>1.8</java.version>
-    <mysql.version>5.1.47</mysql.version>
+    <mysql.version>8.0.28</mysql.version>
     <postgres-jdbc.version>42.3.3</postgres-jdbc.version>
     <morphia.version>1.3.2</morphia.version>
     <ebean-annotation.version>3.4</ebean-annotation.version>