added label to directives table

Author: rsill-neo4j

modules/ROOT/pages/directives/index.adoc

@@ -112,7 +112,7 @@ Particularly useful for types that are not correctly pluralized or are non-Engli
 | Indicates that there should be a uniqueness constraint in the database for the fields that it is applied to.
 
 | xref::/directives/indexes-and-constraints.adoc#_vector_index_search[`@vector`]
-| Perform a vector index search on your database either based by passing in a vector index or a search phrase.
+| Perform a vector index search on your database either based by passing in a vector index or a search phrase. label:beta[]
 
 |===