Kdu documentation for helm v3

Currently, the documentation does not reflect that for local v3 helm charts the name of the folder must be helm-chart-v3s, instead of helm-charts for v2 helm charts. This PR aims to clarify this.

Related bug: https://osm.etsi.org/bugzilla/show_bug.cgi?id=2179

05-quickstarts.md

@@ -620,11 +620,11 @@ git clone --recursive https://osm.etsi.org/gitlab/vnf-onboarding/osm-packages
 
 First, explore the folder `openldap_knf`, in particular, the file `openldap_vnfd.yaml`. This is the CNF descriptor, which models a single KDU (Kubernetes Deployment Unit) with the specified helm chart (`stable/openldap` here), a single connection point (`mgmt-ext`) where all Kubernetes services of this helm-chart will be exposed, and certain k8s-cluster requirements (in this case, it must have at least one network to expose services).
 
-In most of the cases, adapting your package would be as simple as changing the helm chart. where all the Kubernetes services of this helm chart will be exposed).
+In most of the cases, adapting your package would be as simple as changing the helm chart.
 
 It must be noted that the descriptor follows a format defined in OSM, augmenting SOL006, because the modeling of CNF or any Kubernetes applications has not yet been included in ETSI NFV SOL006.
 
-By default, it is assumed that the helm version for the helm charts is `v3`. If the helm chart is based on `v2`, the descriptor should add the line `helm-version: v2` in the kdu section.
+By default, it is assumed that the helm version for the helm charts is `v3`. If the helm chart is based on `v2`, the descriptor should add the line `helm-version: v2` in the kdu section. This setting also sets the name for the folder where the helm charts are expected to be if you are using a local helm chart instead of a repo. For `v2`, `helm-charts` is expected. For `v3`, `helm-chart-v3s` is expected.
 
 #### Step 3: Upload the packages to the catalogue
 
@@ -766,6 +766,9 @@ helm fetch stable/openldap
 helm fetch stable/openldap --version 1.2.6
 ```
 
+You must save the helm charts under a folder called `helm-charts` if you are using helm version 2, or under a folder called `helm-chart-v3s` if you are using helm version 3.
+Helm version 3 is the default if not specified in the kdu.
+
 You could even modify a downloaded helm chart, for instance to add new parameters (called values). This [guide](https://helm.sh/docs/chart_template_guide/getting_started/) will help you.
 
 #### Using different instantiation parameters, derived from the helm values file