fix(doc): Handle CRDs in helm upgrade/delete

helm/camel-k/README.md

@@ -56,15 +56,30 @@ additional parameters that can be set during installation.
 
 > **Tip**: List all releases using `helm list`
 
+## Upgrading the Chart
+
+If you are upgrading the `camel-k` Deployment, you should always use a specific version of the chart and pre-install the CRDS:
+
+```
+$ kubectl replace -k "https://github.com/apache/camel-k/config/crd?ref=vx.y.z"
+$ helm upgrade camel-k/camel-k --version x.y.z
+```
+
 ## Uninstalling the Chart
 
 To uninstall/delete the `camel-k` Deployment:
 
 ```bash
-$ helm delete camel-k
+$ helm uninstall camel-k
 ```
 
-The command removes all the Kubernetes resources installed.
+The command removes all of the Kubernetes resources installed, except the CRDs.
+
+To remove them:
+```bash
+
+$ kubectl delete -k "https://github.com/apache/camel-k/config/crd?ref=vx.y.z"
+```
 
 ## Configuration