Bump org.grails.plugins:spring-security-core from 4.0.3 to 6.0.2

Bumps [org.grails.plugins:spring-security-core](https://github.com/grails-plugins/grails-spring-security-core) from 4.0.3 to 6.0.2.
- [Release notes](https://github.com/grails-plugins/grails-spring-security-core/releases)
- [Commits](grails/grails-spring-security-core@v4.0.3...v6.0.2)

---
updated-dependencies:
- dependency-name: org.grails.plugins:spring-security-core
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

examples/test-data-service/build.gradle

@@ -18,7 +18,7 @@ dependencies {
     implementation "org.mongodb:mongodb-driver-sync:$mongodbDriverVersion"
     implementation "org.grails.plugins:views-json"
     implementation "org.grails.plugins:views-json-templates"
-    implementation 'org.grails.plugins:spring-security-core:4.0.3'
+    implementation 'org.grails.plugins:spring-security-core:6.0.2'
     implementation 'org.grails.plugins:spring-security-rest:3.0.1'
     profile "org.grails.profiles:rest-api"
     testImplementation "org.grails:grails-gorm-testing-support"