Merge pull request #1853 from vincepri/kind-06

📖 Update docs to support KIND v0.6.x

Author: k8s-ci-robot

docs/book/src/tasks/installation.md

@@ -18,13 +18,14 @@ Cluster API requires an existing kubernetes cluster accessible via kubectl, choo
 
 <h1>Warning</h1>
 
+**Minimum supported version**: v0.6.x
+
 [kind] is not designed for production use, and is intended for development environments only.
 
 </aside>
 
   ```bash
   kind create cluster --name=clusterapi
-  export KUBECONFIG="$(kind get kubeconfig-path --name="clusterapi")"
   ```
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