[Docs] Fixing phrasing in has-parent-query.asciidoc
@@ -69,7 +69,7 @@ is not mapped.
Child documents can't be sorted by fields in matching parent documents via the
regular sort options. If you need to sort child documents by field in the parent
-documents then you can should use the `function_score` query and then just sort
+documents then you should use the `function_score` query and then just sort
by `_score`.
Sorting tags by parent document' `view_count` field:
