Bump org.junit.platform:junit-platform-testkit in /modules/spock

Bumps [org.junit.platform:junit-platform-testkit](https://github.com/junit-team/junit-framework) from 1.13.3 to 1.13.4.
- [Release notes](https://github.com/junit-team/junit-framework/releases)
- [Commits](https://github.com/junit-team/junit-framework/commits)

---
updated-dependencies:
- dependency-name: org.junit.platform:junit-platform-testkit
  dependency-version: 1.13.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

modules/spock/build.gradle

@@ -17,8 +17,8 @@ dependencies {
 
     testRuntimeOnly 'org.postgresql:postgresql:42.7.7'
     testRuntimeOnly 'mysql:mysql-connector-java:8.0.33'
-    testRuntimeOnly 'org.junit.platform:junit-platform-launcher:1.13.3'
-    testRuntimeOnly 'org.junit.platform:junit-platform-testkit:1.13.3'
+    testRuntimeOnly 'org.junit.platform:junit-platform-launcher:1.13.4'
+    testRuntimeOnly 'org.junit.platform:junit-platform-testkit:1.13.4'
 
     testCompileOnly 'org.jetbrains:annotations:26.0.2'
 }