Upgrade to Grace Fields Plugin 6.1.0

Closes gh-725

Author: rainboyan

gradle/grails.versions.toml

@@ -2,7 +2,7 @@
 asset-pipeline = "6.1.0"
 cache = "6.1.0"
 database-migration = "6.1.0"
-fields = "6.1.0-RC1"
+fields = "6.1.0"
 geb = "6.1.0"
 hibernate = "2023.1.0"
 scaffolding = "6.1.0"