Bump guava in /distribution/tools/plugin-cli (#2119)

Bumps [guava](https://github.com/google/guava) from 30.1.1-jre to 31.0.1-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-type: direct:production
  update-type: version-update:semver-major
...

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

distribution/tools/plugin-cli/build.gradle

@@ -39,7 +39,7 @@ dependencies {
   api "org.bouncycastle:bc-fips:1.0.2.1"
   testImplementation project(":test:framework")
   testImplementation 'com.google.jimfs:jimfs:1.1'
-  testRuntimeOnly 'com.google.guava:guava:30.1.1-jre'
+  testRuntimeOnly 'com.google.guava:guava:31.0.1-jre'
 }
 
 tasks.named("dependencyLicenses").configure {