Fix k8s README
Use the correct KUBE_SECRET value
@@ -27,7 +27,7 @@ There are quite a few ways of running Tailscale inside a Kubernetes Cluster, som
Configure RBAC to allow the Tailscale pod to read/write the `tailscale` secret.
```bash
export SA_NAME=tailscale
- export KUBE_SECRET=tailscale
+ export KUBE_SECRET=tailscale-auth
make rbac
```
