Fix link, resolve inconsistent examples

doc/install/kubernetes/gitlab_omnibus.md

@@ -149,31 +149,19 @@ helm install --name gitlab --set baseDomain=gitlab.io,baseIP=1.1.1.1,gitlab=ee,g
 ## Updating GitLab using the Helm Chart
 
 Once your GitLab Chart is installed, configuration changes and chart updates
-should we done using `helm upgrade`
+should we done using `helm upgrade`:
 
 ```bash
-helm upgrade -f <CONFIG_VALUES_FILE> <RELEASE-NAME> gitlab/gitlab
+helm upgrade -f values.yaml gitlab gitlab/gitlab-omnibus
 ```
 
-where:
-
-- `<CONFIG_VALUES_FILE>` is the path to values file containing your custom
-  [configuration] (#configuring-and-installing-gitlab).
-- `<RELEASE-NAME>` is the name you gave the chart when installing it.
-  In the [Install section](#installing-gitlab-using-the-helm-chart) we called it `gitlab`.
-
 ## Uninstalling GitLab using the Helm Chart
 
 To uninstall the GitLab Chart, run the following:
 
 ```bash
-helm delete <RELEASE-NAME>
+helm delete gitlab
 ```
 
-where:
-
-- `<RELEASE-NAME>` is the name you gave the chart when installing it.
-  In the [Install section](#installing) we called it `gitlab`.
-
 [kube-srv]: https://kubernetes.io/docs/concepts/services-networking/service/#publishing-services---service-types
 [storageclass]: https://kubernetes.io/docs/concepts/storage/persistent-volumes/#storageclasses