Updating url for weave scope

apply fails because cloud.weave.works reached his end of life:
https://www.weave.works/blog/weave-cloud-end-of-service
weaveworks/weave#3960

bootstrap.sh

@@ -4,4 +4,4 @@ kubeadm init --apiserver-advertise-address $(hostname -i)
 mkdir -p $HOME/.kube
 chown $(id -u):$(id -g) $HOME/.kube/config
 kubectl apply -n kube-system -f \
-    "https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 |tr -d '\n')"
+    "https://github.com/weaveworks/scope/releases/download/v1.13.2/k8s-scope.yaml"