Update dependency org.spockframework:spock-core to v2.4-groovy-5.0

Author: renovate[bot]

build.gradle.kts

@@ -24,5 +24,5 @@ apply(plugin = "groovy")
 
 tasks.named<GroovyCompile>("compileTestGroovy") { targetCompatibility = "11" } // allow tests to run against 6.x
 
-dependencies { testImplementation("org.spockframework:spock-core:2.3-groovy-4.0") } //
+dependencies { testImplementation("org.spockframework:spock-core:2.4-groovy-5.0") } //
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