Remove versions from setting-up-your-first-cluster (#9353)

We are maintaining version info on the README.md, and it is not
necessary to maintain that on setting-up-your-first-cluster.md

docs/setting-up-your-first-cluster.md

@@ -14,8 +14,8 @@ hands-on guide to get started with Kubespray.
 
 ## Cluster Details
 
-* [kubespray](https://github.com/kubernetes-sigs/kubespray) v2.17.x
-* [kubernetes](https://github.com/kubernetes/kubernetes) v1.17.9
+* [kubespray](https://github.com/kubernetes-sigs/kubespray)
+* [kubernetes](https://github.com/kubernetes/kubernetes)
 
 ## Prerequisites