fix(deps): update spock monorepo to v2.4-m6-groovy-4.0 (patch) (#13716)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

dependencyManagement/build.gradle.kts

@@ -82,8 +82,8 @@ val CORE_DEPENDENCIES = listOf(
 // this top level to help consistently satisfy large numbers of transitive dependencies.
 val DEPENDENCIES = listOf(
   "org.junit.jupiter:junit-jupiter-api:5.12.2",
-  "org.spockframework:spock-core:2.4-M5-groovy-4.0",
-  "org.spockframework:spock-junit4:2.4-M5-groovy-4.0",
+  "org.spockframework:spock-core:2.4-M6-groovy-4.0",
+  "org.spockframework:spock-junit4:2.4-M6-groovy-4.0",
 
   "io.r2dbc:r2dbc-proxy:1.1.5.RELEASE",
   "ch.qos.logback:logback-classic:1.3.15", // 1.4+ requires Java 11+