[time.zone.zonedtime.overview] Fix typo (#3846)

Author: timsong-cpp

source/time.tex

@@ -9652,7 +9652,7 @@
     using @\exposid{time-zone-representation}@ =        // \expos
       conditional_t<is_convertible_v<TimeZonePtrOrName, string_view>,
                     const time_zone*,
-                    remove_cv_ref<TimeZonePtrOrName>>;
+                    remove_cvref_t<TimeZonePtrOrName>>;
 
   template<class TimeZonePtrOrName>
     zoned_time(TimeZonePtrOrName&&)