fix punk::mix::base has_handler error

src/modules/punk/mix/base-0.1.tm

@@ -364,7 +364,7 @@ namespace eval punk::mix::base {
             set folderdict [dict create]
 
             package require punk::cap
-            if {[punk::cap::has_handler punk.templates]} {
+            if {[punk::cap::capability_has_handler punk.templates]} {
                 set template_folder_dict [punk::cap::call_handler punk.templates folders]
                 dict for {dir folderinfo} $template_folder_dict {
                     dict set folderdict $dir $folderinfo