Remove wrong link in index phrases doc

Relates #30450

docs/reference/mapping/types/text.asciidoc

@@ -96,7 +96,7 @@ The following parameters are accepted by `text` fields:
     the expense of a larger index. Accepts an
     <<index-prefix-config,`index-prefix configuration block`>>
 
-<<index-phrases,`index_phrases`>>::
+`index_phrases`::
 
     If enabled, two-term word combinations ('shingles') are indexed into a separate
     field.  This allows exact phrase queries to run more efficiently, at the expense