[MRESOLVER-717] Bump org.codehaus.plexus:plexus-classworlds from 2.7.0 to 2.9.0 (#713)

Bumps [org.codehaus.plexus:plexus-classworlds](https://github.com/codehaus-plexus/plexus-classworlds) from 2.7.0 to 2.9.0.
- [Release notes](https://github.com/codehaus-plexus/plexus-classworlds/releases)
- [Commits](codehaus-plexus/plexus-classworlds@plexus-classworlds-2.7.0...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] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

maven-resolver-transport-wagon/pom.xml

@@ -58,7 +58,7 @@
     <dependency>
       <groupId>org.codehaus.plexus</groupId>
       <artifactId>plexus-classworlds</artifactId>
-      <version>2.7.0</version>
+      <version>2.9.0</version>
       <optional>true</optional>
     </dependency>
     <dependency>