Split the codeblock in the RPM install page (#2223)

Author: NataliaIvakina

modules/ROOT/pages/installation/linux/rpm.adoc

@@ -31,11 +31,17 @@ Installation instructions can be found on the manufacturer's website:
 [[linux-rpm-install-standard]]
 === Set up the repository
 
-To add the Neo4j repository to the package manager, run the following as a sudo user:
+To add the Neo4j repository to the package manager, run the following command as a sudo user:
 
 [source, shell, subs="attributes"]
 ----
 rpm --import https://debian.neo4j.com/neotechnology.gpg.key
+----
+
+Create a `neo4j.repo` file:
+
+[source, shell, subs="attributes"]
+----
 cat << EOF >  /etc/yum.repos.d/neo4j.repo
 [neo4j]
 name=Neo4j RPM Repository