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

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](mysql/mysql-connector-j@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]>

Author: dependabot[bot]

frameworks/Java/servlet/pom.xml

@@ -73,7 +73,7 @@
 				<dependency>
 					<groupId>mysql</groupId>
 					<artifactId>mysql-connector-java</artifactId>
-					<version>8.0.18</version>
+					<version>8.0.28</version>
 				</dependency>
 			</dependencies>
 			<build>