build(deps): Bump spock-core in /gradle-plugins

Bumps spock-core from 2.1-groovy-3.0 to 2.2-groovy-4.0.

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

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

gradle-plugins/biz.aQute.bnd.gradle/build.gradle.kts

@@ -73,7 +73,7 @@ dependencies {
 	implementation("biz.aQute.bnd:biz.aQute.repository:${version}")
 	implementation("biz.aQute.bnd:biz.aQute.resolve:${version}")
 	runtimeOnly("biz.aQute.bnd:biz.aQute.bnd.embedded-repo:${version}")
-	testImplementation("org.spockframework:spock-core:2.1-groovy-3.0")
+	testImplementation("org.spockframework:spock-core:2.2-groovy-4.0")
 }
 
 // Gradle plugin descriptions