Bump com.google.guava:guava from 33.4.7-jre to 33.4.8-jre (#99)

Bumps [com.google.guava:guava](https://github.com/google/guava) from 33.4.7-jre to 33.4.8-jre.
- [Release notes](https://github.com/google/guava/releases)
- [Commits](https://github.com/google/guava/commits)

---
updated-dependencies:
- dependency-name: com.google.guava:guava
  dependency-version: 33.4.8-jre
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

maven-plugin-testing-harness/pom.xml

@@ -144,7 +144,7 @@ under the License.
       <!-- newer version is required by plexus-testing -->
       <groupId>com.google.guava</groupId>
       <artifactId>guava</artifactId>
-      <version>33.4.7-jre</version>
+      <version>33.4.8-jre</version>
     </dependency>
     <dependency>
       <groupId>junit</groupId>