CVE-2020-27216: Jetty webserver vulnerability

GitHub detected a high severity vulnerability against our Jetty web server, see https://github.com/advisories/GHSA-g3wg-6mcf-8jj6. To mitigate the vulnerability we have to upgrade our Jetty web server from 9.4.30.v20200611 to 9.4.34.v20201102.

The dependency bot from GitHub was not able to upgrade the latest version because we have a version limit in our pom.xml for the web app:

<dependency>
 <groupId>org.eclipse.jetty</groupId>
 <artifactId>jetty-webapp</artifactId>
 <version>[9.4.33,)</version>
</dependency>

or set a custom temp directory as workaround

java -Djava.io.tmpdir=/var/web/work -jar start.jar