Fix helm chart installation steps in documentation (#56)

Signed-off-by: Waleed Malik <ahmedwaleedmalik@gmail.com>

README.md

@@ -8,7 +8,6 @@ An example on creating a k3k cluster on an RKE2 host using k3kcli
 
 [![asciicast](https://asciinema.org/a/eYlc3dsL2pfP2B50i3Ea8MJJp.svg)](https://asciinema.org/a/eYlc3dsL2pfP2B50i3Ea8MJJp)
 
-
 ## Usage
 
 K3K consists of a controller and a cli tool, the controller can be deployed via a helm chart and the cli can be downloaded from the releases page.
@@ -20,33 +19,40 @@ Helm's [documentation](https://helm.sh/docs) to get started.
 
 Once Helm has been set up correctly, add the repo as follows:
 
-```
+```sh
   helm repo add k3k https://rancher.github.io/k3k
 ```
 
 If you had already added this repo earlier, run `helm repo update` to retrieve
 the latest versions of the packages.  You can then run `helm search repo
-k3k` to see the charts.
+k3k --devel` to see the charts.
 
 To install the k3k chart:
 
-    helm install my-k3k k3k/k3k
+```sh
+helm install my-k3k k3k/k3k --devel
+```
 
 To uninstall the chart:
 
-    helm delete my-k3k
+```sh
+helm delete my-k3k
+```
+
+**NOTE: Since k3k is still under development, the chart is marked as a development chart, this means that you need to add the `--devel` flag to install it.**
 
 ### Create a new cluster
 
 To create a new cluster you need to install and run the cli or create a cluster object, to install the cli:
 
-```
-wget https://github.com/rancher/k3k/releases/download/v0.0.0-alpha2/k3kcli
+```sh
+wget https://github.com/rancher/k3k/releases/download/v0.0.0-alpha6/k3kcli
 chmod +x k3kcli
 sudo cp k3kcli /usr/local/bin
 ```
 
 To create a new cluster you can use:
-```
+
+```sh
 k3k cluster create --name example-cluster --token test
-```
+```