[DOCS] Fix typo in knn-search.asciidoc (#91206)

docs/reference/search/knn-search.asciidoc

@@ -4,7 +4,7 @@
 <titleabbrev>kNN search</titleabbrev>
 ++++
 
-deprecated::[8.4.0,"The kNN search API has been replaced by the <<<<search-api-knn, `knn` option>> in the search API."]
+deprecated::[8.4.0,"The kNN search API has been replaced by the <<search-api-knn, `knn` option>> in the search API."]
 
 Performs a k-nearest neighbor (kNN) search and returns the matching documents.