Bump guava_version from 33.4.6-jre to 33.4.8-jre

Bumps `guava_version` from 33.4.6-jre to 33.4.8-jre.

Updates `com.google.guava:guava` from 33.4.6-jre to 33.4.8-jre
- [Release notes](https://github.com/google/guava/releases)
- [Commits](https://github.com/google/guava/commits)

Updates `com.google.guava:guava-testlib` from 33.4.6-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
- dependency-name: com.google.guava:guava-testlib
  dependency-version: 33.4.8-jre
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -1,5 +1,5 @@
 [versions]
-guava_version = "33.4.6-jre"
+guava_version = "33.4.8-jre"
 junit_version = "5.12.2"
 hamcrest_version = "3.0"
 mockito_version = "5.17.0"