Update Grails BOM to point to scaffolding plugin 5.0.0

Author: puneetbehl

grails-bom/plugins.properties

@@ -5,7 +5,7 @@ grails-gradle-plugin=6.0.0
 cache=5.0.1
 rxjava=1.1.1
 rxjava2=2.0.0
-scaffolding=5.0.0-M1
+scaffolding=5.0.0
 fields=3.0.0.RC1
 geb=3.0.0
 views-json=3.0.0