Bump org.codehaus.plexus:plexus-classworlds from 2.8.0 to 2.9.0

Bumps [org.codehaus.plexus:plexus-classworlds](https://github.com/codehaus-plexus/plexus-classworlds) from 2.8.0 to 2.9.0.
- [Release notes](https://github.com/codehaus-plexus/plexus-classworlds/releases)
- [Commits](codehaus-plexus/plexus-classworlds@plexus-classworlds-2.8.0...plexus-classworlds-2.9.0)

---
updated-dependencies:
- dependency-name: org.codehaus.plexus:plexus-classworlds
  dependency-version: 2.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

querydsl-tooling/querydsl-maven-plugin/pom.xml

@@ -32,7 +32,7 @@
       <dependency>
         <groupId>org.codehaus.plexus</groupId>
         <artifactId>plexus-classworlds</artifactId>
-        <version>2.8.0</version>
+        <version>2.9.0</version>
       </dependency>
     </dependencies>
   </dependencyManagement>