docs: switch kubebuilder installation instructions on macOS to homebrew

Author: AndiDog

docs/book/src/developer/providers/implementers-guide/overview.md

@@ -27,6 +27,9 @@ brew install kubernetes-cli
 
 # Install kustomize
 brew install kustomize
+
+# Install Kubebuilder
+brew install kubebuilder
 ```
 {{#/tab }}
 {{#tab Linux}}
@@ -39,17 +42,15 @@ curl -fLO https://dl.k8s.io/release/${KUBECTL_VERSION}/bin/linux/amd64/kubectl
 # Install kustomize
 curl -s "https://raw.githubusercontent.com/kubernetes-sigs/kustomize/master/hack/install_kustomize.sh"  | bash
 chmod +x ./kustomize && sudo mv ./kustomize /usr/local/bin/kustomize
-```
-
-{{#/tab }}
-{{#/tabs }}
 
-```bash
 # Install Kubebuilder
 curl -sLo kubebuilder https://go.kubebuilder.io/dl/latest/$(go env GOOS)/$(go env GOARCH)
 chmod +x ./kubebuilder && sudo mv ./kubebuilder /usr/local/bin/kubebuilder
 ```
 
+{{#/tab }}
+{{#/tabs }}
+
 [kubebuilder-book]: https://book.kubebuilder.io/
 [kubectl-install]: http://kubernetes.io/docs/user-guide/prereqs/
 [install-kustomize]: https://kubectl.docs.kubernetes.io/installation/kustomize/