chore(deps): bump mysql-connector-java from 5.1.26 to 8.0.16 in /server

Bumps [mysql-connector-java](https://github.com/mysql/mysql-connector-j) from 5.1.26 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@5.1.26...8.0.16)

Signed-off-by: dependabot[bot] <support@github.com>

server/pom.xml

@@ -92,7 +92,7 @@
 
     <jdbc.groupId>mysql</jdbc.groupId>
     <jdbc.artifactId>mysql-connector-java</jdbc.artifactId>
-    <jdbc.version>5.1.26</jdbc.version>
+    <jdbc.version>8.0.16</jdbc.version>
 
     <!-- TODO try provided -->
     <resteasy.scope>compile</resteasy.scope>