Bump spock-mockable from 2.2.0 to 2.3.0

Bumps [spock-mockable](https://github.com/joke/spock-mockable) from 2.2.0 to 2.3.0.
- [Release notes](https://github.com/joke/spock-mockable/releases)
- [Changelog](https://github.com/joke/spock-mockable/blob/main/CHANGELOG.md)
- [Commits](joke/spock-mockable@v2.2.0...v2.3.0)

---
updated-dependencies:
- dependency-name: io.github.joke:spock-mockable
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

client/build.gradle.kts

@@ -125,7 +125,7 @@ dependencies {
   testImplementation("org.spockframework:spock-core:2.3-groovy-3.0")
   testRuntimeOnly("net.bytebuddy:byte-buddy:1.12.19")
   testRuntimeOnly("org.objenesis:objenesis:3.3")
-  testImplementation("io.github.joke:spock-mockable:2.2.0")
+  testImplementation("io.github.joke:spock-mockable:2.3.0")
 
   testImplementation("org.apache.commons:commons-lang3:3.12.0")
 }