Update modules/ROOT/pages/migration/index.adoc

Co-authored-by: Richard Sill <156673635+rsill-neo4j@users.noreply.github.com>

Author: angrykoala

modules/ROOT/pages/migration/index.adoc

@@ -554,14 +554,8 @@ new Neo4jGraphQL({
 
 === Deprecated `@unique` directive
 
-The `@unique` directive will no longer be supported in future versions:
-[source, graphql, indent=0]
-----
-type Movie implements Production @node {
-    title: String! @unique
-    actors: [Actor!]! @relationship(type: "ACTED_IN", direction: IN, properties: "ActedIn")
-}
-----
+The xref::/directives/indexes-and-constraints.adoc#_unique[`@unique`] directive will no longer be supported in future versions.
+It cannot always be reliably enforced, potentially leading to data inconsistencies that don't match the schema.
 
 The `@unique` directive has been removed as it could not always be reliably enforced, potentially leading to data inconsistencies that did not match the schema.