Bump com.google.guava:guava from 33.4.0-jre to 33.4.8-jre

Bumps [com.google.guava:guava](https://github.com/google/guava) from 33.4.0-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] <[email protected]>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -18,7 +18,7 @@ buf = { module = "build.buf:buf", version.ref = "buf" }
 cel = { module = "org.projectnessie.cel:cel-bom", version.ref = "cel" }
 cel-core = { module = "org.projectnessie.cel:cel-core" }
 errorprone = { module = "com.google.errorprone:error_prone_core", version = "2.37.0" }
-guava = { module = "com.google.guava:guava", version = "33.4.0-jre" }
+guava = { module = "com.google.guava:guava", version = "33.4.8-jre" }
 ipaddress = { module = "com.github.seancfoley:ipaddress", version.ref = "ipaddress" }
 jakarta-mail-api = { module = "jakarta.mail:jakarta.mail-api", version = "2.1.3" }
 junit-bom = { module = "org.junit:junit-bom", version.ref = "junit" }