Split the code block (neo4j#2225)

Based on the PR neo4j#2223

Author: NataliaIvakina

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

@@ -55,6 +55,12 @@ To use the repository for generally available versions of Neo4j, run the followi
 [source, shell, subs="attributes"]
 ----
 rpm --import https://debian.neo4j.com/neotechnology.gpg.key
+----
+
+To create a `neo4j.repo` file, run the following command:
+
+[source, shell, subs="attributes"]
+----
 cat << EOF >  /etc/yum.repos.d/neo4j.repo
 [neo4j]
 name=Neo4j RPM Repository