Bump mysql-connector-java in /frameworks/Java/dropwizard

Bumps [mysql-connector-java](https://github.com/mysql/mysql-connector-j) from 8.0.18 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/8.0.18...8.0.28)

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

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

frameworks/Java/dropwizard/pom.xml

@@ -17,7 +17,7 @@
 		<dropwizard.version>1.3.12</dropwizard.version>
 		<javax-activation.version>1.1.1</javax-activation.version>
 		<jaxb.version>2.3.0</jaxb.version>
-		<mysql-connector-java.version>8.0.18</mysql-connector-java.version>
+		<mysql-connector-java.version>8.0.28</mysql-connector-java.version>
 		<mongojack.version>2.9.4</mongojack.version>
 		<postgres-jdbc.version>42.3.3</postgres-jdbc.version>
 		<maven-compiler-plugin.version>3.8.0</maven-compiler-plugin.version>