Update dependency org.grails:grails-gorm-testing-support to v3.1.1 (#795)

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

Author: renovate[bot]

gradle.properties

@@ -29,7 +29,7 @@ fieldsVersion=3.0.0.RC1
 grailsVersion=6.1.0
 micrometer.version=1.8.0
 scaffoldingVersion=4.1.0
-testingSupportVersion=3.1.0
+testingSupportVersion=3.1.1
 org.gradle.caching=true
 org.gradle.parallel=false
 org.gradle.daemon=true