Update dependency org.grails:grails-gorm-testing-support to v2.6.1 (#526)

Co-authored-by: Renovate Bot <[email protected]>

Author: renovate[bot]

gradle.properties

@@ -33,5 +33,5 @@ fieldsVersion=3.0.0.RC1
 grailsVersion=5.1.7
 micrometer.version=1.8.0
 scaffolingVersion=4.0.0.RC1
-testingSupportVersion=2.6.0
+testingSupportVersion=2.6.1
 micronaut.spring.version=4.0.1