docs: revised Helm install to create namespace and install on dedicated namespace (#11440)

* docs: revised Helm install to create namespace and install on dedicated Consul namespace

* Update website/content/docs/k8s/installation/install.mdx

Co-authored-by: mrspanishviking <kcardenas@hashicorp.com>

* Update install.mdx

* changing to Helm 3.2+ as a pre-req to make it easier to follow
* might as well bump to latest version

Co-authored-by: mrspanishviking <kcardenas@hashicorp.com>

website/content/docs/k8s/installation/install.mdx

@@ -54,7 +54,7 @@ manual configuration.
 
 ### Prerequisites
 
-The Consul Helm only supports Helm 3. Install the latest version of the Helm CLI here:
+The Consul Helm only supports Helm 3.2+. Install the latest version of the Helm CLI here:
 [Installing Helm](https://helm.sh/docs/intro/install/).
 
 ### Installing Consul
@@ -71,13 +71,26 @@ The Consul Helm only supports Helm 3. Install the latest version of the Helm CLI
    ```shell-session
    $ helm search repo hashicorp/consul
    NAME            	CHART VERSION	APP VERSION	DESCRIPTION
-   hashicorp/consul	0.32.0       	1.10.0      Official HashiCorp Consul Chart
+   hashicorp/consul	0.35.0       	1.10.3      Official HashiCorp Consul Chart
    ```
 
-1. Issue the following command to install Consul with the default configuration using Helm 3:
+1. Prior to installing via Helm, ensure that the `consul` Kubernetes namespace does not exist, as installing on a dedicated namespace
+   is recommended.  
 
     ```shell-session
-   $ helm install consul hashicorp/consul --set global.name=consul
+    $ kubectl get namespace
+    NAME              STATUS   AGE
+    default           Active   18h
+    kube-node-lease   Active   18h
+    kube-public       Active   18h
+    kube-system       Active   18h
+    ```
+
+1. Issue the following command to install Consul with the default configuration using Helm. You could also install Consul on a dedicated 
+   namespace of your choosing by modifying the value of the `-n` flag for the Helm install.
+
+   ```shell-session
+   $ helm install consul hashicorp/consul --set global.name=consul --create-namespace -n consul
    NAME: consul
    ...
    ```