add a link to the cypher manual

Author: renetapopova

modules/ROOT/pages/performance/vector-index-memory-configuration.adoc

@@ -1,7 +1,7 @@
 = Vector index memory configuration
 :description: How to configure Neo4j vector indexes to enhance performance in search operations.
 
-Vector indexes are based on link:https://lucene.apache.org/[Lucene].
+link:{neo4j-docs-base-uri}/cypher-manual/current/indexes/semantic-indexes/vector-indexes/[Vector indexes] are based on link:https://lucene.apache.org/[Lucene].
 Lucene does not use Neo4j page cache memory, it uses OS memory as described in the xref:performance/memory-configuration.adoc[Memory configuration] section.
 When you have a vector index, you must ensure that there is sufficient memory for the JVM heap, Neo4j page cache, and the Lucene vector indexes to perform optimally.
 If Lucene has insufficient memory, the OS will perform page swapping and read data from disk, which will dramatically degrade the Neo4j vector index search performance.