Bump mysql-connector-java in /developer-tools/java-debugging/app

Bumps [mysql-connector-java](https://github.com/mysql/mysql-connector-j) from 5.1.21 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@5.1.21...8.0.16)

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

Author: dependabot[bot]

developer-tools/java-debugging/app/pom.xml

@@ -28,7 +28,7 @@
 		<dependency>
 			<groupId>mysql</groupId>
 			<artifactId>mysql-connector-java</artifactId>
-			<version>5.1.21</version>
+			<version>8.0.16</version>
 		</dependency>
 		<dependency>
 			<groupId>org.hibernate</groupId>