Bump org.spockframework:spock-junit4

Bumps [org.spockframework:spock-junit4](https://github.com/spockframework/spock) from 2.4-M5-groovy-3.0 to 2.4-M5-groovy-4.0.
- [Release notes](https://github.com/spockframework/spock/releases)
- [Changelog](https://github.com/spockframework/spock/blob/master/docs/release_notes.adoc)
- [Commits](https://github.com/spockframework/spock/commits)

---
updated-dependencies:
- dependency-name: org.spockframework:spock-junit4
  dependency-type: direct:production
...

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

gradle/libs.versions.toml

@@ -18,5 +18,5 @@ kotlin-bom = { module = "org.jetbrains.kotlin:kotlin-bom", version.ref = "kotlin
 kotlin-stdlib = { module = "org.jetbrains.kotlin:kotlin-stdlib-jdk8", version.ref = "kotlin" }
 kotlinx-html = { module = "org.jetbrains.kotlinx:kotlinx-html-jvm", version = "0.12.0" }
 maven-model = { module = "org.apache.maven:maven-model", version = "3.9.9" }
-spock = { module = "org.spockframework:spock-junit4", version = "2.4-M5-groovy-3.0" } # 2.4-M5-groovy-4.0
+spock = { module = "org.spockframework:spock-junit4", version = "2.4-M5-groovy-4.0" } # 2.4-M5-groovy-4.0
 xmlunit = { module = "org.xmlunit:xmlunit-matchers", version = "2.10.0" }