bugfix: Allow . in enxtended variable paths

internal/stringvariables/entities.go

@@ -11,7 +11,7 @@ import (
 var r *regexp.Regexp
 
 func init() {
-	r = regexp.MustCompile(`{{ *?([a-zA-Z0-9_]+)\.([a-zA-Z0-9_]+) *?}}`)
+	r = regexp.MustCompile(`{{ *?([a-zA-Z0-9_]+)\.([a-zA-Z0-9_\.]+) *?}}`)
 }
 
 func ReplaceEntityVars(prefix string, source string) string {