Update modules/ROOT/pages/performance/index-configuration.adoc

Author: renetapopova

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

@@ -127,7 +127,7 @@ For more information, see link:{neo4j-docs-base-uri}/cypher-manual/{page-version
 [[index-configuration-btree-migration]]
 === Index migration
 
-When upgrading a 3.5 store to 4.4.34, all indexes are upgraded to the latest index version and rebuilt automatically, except for those previously using Lucene for single-property strings.
+When upgrading a 3.5 store to {neo4j-version-exact}, all indexes are upgraded to the latest index version and rebuilt automatically, except for those previously using Lucene for single-property strings.
 They have been upgraded to a fallback version that uses Lucene for those properties.
 Note that they still need to be rebuilt.
 For more information, see link:{neo4j-docs-base-uri}/upgrade-migration-guide/current/version-4/migration/neo4j-indexes/[Upgrade and Migration Guide -> Neo4j indexes].