Bump powermock-module-junit4 from 2.0.7 to 2.0.9 (#776)

Bumps [powermock-module-junit4](https://github.com/powermock/powermock) from 2.0.7 to 2.0.9.
- [Release notes](https://github.com/powermock/powermock/releases)
- [Changelog](https://github.com/powermock/powermock/blob/release/2.x/docs/changelog.txt)
- [Commits](powermock/powermock@powermock-2.0.7...powermock-2.0.9)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

gradle-server/build.gradle

@@ -20,7 +20,7 @@ dependencies {
   runtimeOnly 'org.slf4j:slf4j-simple:2.0.0-alpha1'
   testImplementation "io.grpc:grpc-testing:${grpcVersion}"
   testImplementation 'junit:junit:4.13.1'
-  testImplementation 'org.powermock:powermock-module-junit4:2.0.7'
+  testImplementation 'org.powermock:powermock-module-junit4:2.0.9'
   testImplementation 'org.powermock:powermock-api-mockito2:2.0.7'
 }