Fix the default Bolt port (neo4j#2014) (neo4j#2018)

Author: NataliaIvakina

modules/ROOT/pages/clustering/setup/discovery.adoc

@@ -248,7 +248,7 @@ dbms.cluster.discovery.v2.endpoints=server01.example.com:6000,server02.example.c
 +
 [source, shell, role=nocopy noplay]
 ----
-./cypher-shell -a bolt://localhost:7681 -d system
+./cypher-shell -a bolt://localhost:7687 -d system
 ----
 . Run the procedure:
 +
@@ -385,7 +385,7 @@ It is important to connect via `bolt://` because otherwise the procedure might b
 +
 [source, shell, role=nocopy noplay]
 ----
-./cypher-shell -a bolt://localhost:7681 -d system
+./cypher-shell -a bolt://localhost:7687 -d system
 ----
 
 . Run the procedure:
@@ -536,7 +536,7 @@ Restart them sequentially, not in parallel.
 image:discovery-service/in-place-23-v1-over-v2.png[]
 
 . Using `bolt://`, connect to the system database of servers 1, 2, 3, and run the following procedure.
-This can be done using via `./cypher-shell -a bolt://localhost:7681 -d system` for example.
+This can be done using via `./cypher-shell -a bolt://localhost:7687 -d system` for example.
 +
 [source,cypher]
 ----