Apply suggestion from @Joseph-Edwards

Co-authored-by: Joe Edwards <80713360+Joseph-Edwards@users.noreply.github.com>

Author: james-d-mitchell

src/present.cpp

@@ -1391,7 +1391,7 @@ empty word to the presentation *p*, for every cyclic permutation ``w`` of
 :type p: Presentation
 
 :param relator: the word.
-:type relator: Word
+:type relator: :ref:`Word<pseudo_word_type_helper>`
 
 :raises LibsemigroupsError:
   if *relator* contains any letters not belonging to ``p.alphabet()``.