Fix template afunc handler definition

system/automation/templates_handler.yaml

@@ -153,7 +153,7 @@ functions:
           - { wf: String }
       variables:
         types:
-          - { wf: Vars }
+          - { wf: Vars, go: 'expr.RVars' }
       options:
         types:
           - { wf: RenderOptions }