Update spec/locale.html

Co-authored-by: Richard Gibson <[email protected]>

Author: FrankYFTang

spec/locale.html

@@ -611,8 +611,8 @@ <h1>
         1. Return {[[Region]]: _region_, [[RegionOverride]]: _regionOverride_}.
       </emu-alg>
     </emu-clause>
-    
-    <emu-clause id="sec-calendarsoflocale" type="abstract operation">
+
+    <emu-clause id="sec-calendarsoflocale" type="implementation-defined abstract operation">
       <h1>
         CalendarsOfLocale (
           _loc_: an Intl.Locale,