Make sure <( )> is in the regex category

Author: samcv

doc/Language/regexes.pod6

@@ -715,7 +715,7 @@ all named captures:
 There is a more convenient way to get named captures which is discussed in
 the section on Subrules.
 
-=head2 X«Capture markers|<(,)>»
+=head2 X«Capture markers|regex,<( )>»
 
 A C«<(» token indicates the start of the match's overall capture, while the corresponding C«)>»
 token indicates its endpoint. The C«<(» is similar to other languages X<\K|\K> to discard any matches