Error missing in the content-nav (neo4j#294) (neo4j#295)

Cherry-picked from neo4j#294

Co-authored-by: Lidia Zuin <[email protected]>

Author: renetapopova

modules/ROOT/content-nav.adoc

@@ -436,6 +436,7 @@
 **** xref:errors/gql-errors/52N24.adoc[]
 **** xref:errors/gql-errors/52N25.adoc[]
 **** xref:errors/gql-errors/52N26.adoc[]
+**** xref:errors/gql-errors/52N27.adoc[]
 **** xref:errors/gql-errors/52N28.adoc[]
 **** xref:errors/gql-errors/52N29.adoc[]
 **** xref:errors/gql-errors/52N30.adoc[]