fix(deps): update dependency org.grails:grails-gorm-testing-support to v3.1.2 (#690)

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

Author: renovate[bot]

grails-datastore-gorm-mongodb/build.gradle

@@ -14,7 +14,7 @@ dependencies {
     compileOnly "javax.servlet:javax.servlet-api:$servletApiVersion"
 
     testImplementation "org.grails:grails-datastore-gorm-tck:$datastoreVersion"
-    testImplementation "org.grails:grails-gorm-testing-support:3.1.1"
+    testImplementation "org.grails:grails-gorm-testing-support:3.1.2"
     testImplementation "org.hibernate:hibernate-validator:$hibernateValidatorVersion"
     testImplementation "org.grails:grails-datastore-gorm-support:$datastoreVersion", {
         exclude group: "org.grails", module:"grails-datastore-gorm-hibernate-core"