[stable/owncloud] Adapt docs to Helm 3 (#20669)

Signed-off-by: Carlos Rodriguez Hernandez <crhernandez@bitnami.com>

stable/owncloud/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: owncloud
-version: 8.1.1
+version: 8.1.2
 appVersion: 10.3.2
 description: A file sharing server that puts the control and security of your own data back into your hands.
 keywords:

stable/owncloud/README.md

@@ -5,7 +5,7 @@
 ## TL;DR;
 
 ```console
-$ helm install stable/owncloud
+$ helm install my-release stable/owncloud
 ```
 
 ## Introduction
@@ -28,7 +28,7 @@ Bitnami charts can be used with [Kubeapps](https://kubeapps.com/) for deployment
 To install the chart with the release name `my-release`:
 
 ```console
-$ helm install --name my-release stable/owncloud
+$ helm install my-release stable/owncloud
 ```
 
 The command deploys ownCloud on the Kubernetes cluster in the default configuration. The [Parameters](#parameters) section lists the parameters that can be configured during installation.
@@ -127,7 +127,7 @@ The above parameters map to the env variables defined in [bitnami/owncloud](http
 Specify each parameter using the `--set key=value[,key=value]` argument to `helm install`. For example,
 
 ```console
-$ helm install --name my-release \
+$ helm install my-release \
   --set owncloudUsername=admin,owncloudPassword=password,mariadb.mariadbRootPassword=secretpassword \
     stable/owncloud
 ```
@@ -137,7 +137,7 @@ The above command sets the ownCloud administrator account username and password
 Alternatively, a YAML file that specifies the values for the above parameters can be provided while installing the chart. For example,
 
 ```console
-$ helm install --name my-release -f values.yaml stable/owncloud
+$ helm install my-release -f values.yaml stable/owncloud
 ```
 
 > **Tip**: You can use the default [values.yaml](values.yaml)