book: add kubebuilder workshop in the book
@@ -41,6 +41,7 @@ Including:
GitBook: [book.kubebuilder.io](http://book.kubebuilder.io)<br/>
GitHub Repo: [kubernetes-sigs/kubebuilder](https://github.com/kubernetes-sigs/kubebuilder)<br/>
+Workshop: [kubebuilder-workshop](https://github.com/pwittrock/kubebuilder-workshop)<br/>
Slack channel: [#kubeuilder](http://slack.k8s.io/#kubebuilder)<br/>
Google Group: [kubebuilder@googlegroups.com](https://groups.google.com/forum/#!forum/kubebuilder)<br/>
Planned Work: [Sprint Dashboard](https://github.com/kubernetes-sigs/kubebuilder/projects/1)<br/>
