Update 03-installing-osm.md

03-installing-osm.md

@@ -506,7 +506,7 @@ For additional options, see `osm --help` for more info, and check our OSM client
 
 ## Reference. Helm-based OSM installation
 
-With Release FIFTEEN, the deployment of OSM services (LCM, RO, NBI, NG-UI, etc.) in the community installer is done with a Helm chart.
+Since Release FOURTEEN, the deployment of OSM services (LCM, RO, NBI, NG-UI, etc.) in the community installer is done with a Helm chart.
 
 When OSM is installed, behind the scenes the following steps are done:
 
@@ -578,10 +578,9 @@ Assuming that you have a Kubernetes cluster, and you have bootstrapped a Juju co
 
 ### Deploy MongoDB using helm chart
 
-```bash
-# The following instructions assume that helm  is installed and 
-# default storage class is available in kubernetes cluster.
+The following instructions assume that helm is installed and default storage class is available in kubernetes cluster.
 
+```bash
 git clone "https://osm.etsi.org/gerrit/osm/devops"
 cd devops
 # Optionally check out a specific version
@@ -645,6 +644,10 @@ Deploy OSM Helm chart:
 
 ```bash
 # Make sure you are in devops directory
+cd devops
+# Optionally check out a specific version
+# DESIRED_OSM_VERSION="15.0.0"
+# git checkout $DESIRED_OSM_VERSION
 
 # Check default values
 helm -n osm show values installers/helm/osm