[time.zone.db.remote] replace "this section" with "this subclause" (#2103)

Author: jwakely

source/utilities.tex

@@ -26472,7 +26472,7 @@
 While the program is running,
 the implementation may choose to update the time zone database.
 This update shall not impact the program in any way
-unless the program calls the functions in this section.
+unless the program calls the functions in this subclause.
 This potentially updated time zone database
 is referred to as the \defn{remote time zone database}.