Update 05-quickstarts.md

Update with usage of OCI registries

05-quickstarts.md

@@ -736,6 +736,12 @@ osm repo-list
 osm repo-show bitnami
 ```
 
+If the repo is an OCI Registry, the complete URL without the helm chart must be present. For instance, for a helm chart located in `oci://myregistry.io/project/charts/mychart` add the following repo:
+
+```
+osm repo-add --type helm-chart --description "bitnami OCI" bitnami-oci oci://myregistry.io/project/charts
+```
+
 Descriptors can include that reference as follows:
 
 ```