fix microk8s command to enable cilium
fix microk8s command to enable cilium

As per Documentation of microk8s (https://microk8s.io/docs/addons), enabling add-ons are being invoked with `microk8s enable <addon>` - note the missing „.“.
Also tested this locally

`microk8s enable cilium`

Signed-off-by: Philipp Gniewosz <d644a8a26a6fc9c1b992082361cb8e47d250679e@posteo.de>

michi-covalent/cilium,michi-covalent/cilium,cilium/cilium,tklauser/cilium,michi-covalent/cilium,tklauser/cilium,tklauser/cilium,tgraf/cilium,tgraf/cilium,tgraf/cilium,cilium/cilium,tgraf/cilium,cilium/cilium,cilium/cilium,tklauser/cilium,cilium/cilium,tklauser/cilium,michi-covalent/cilium,michi-covalent/cilium,tgraf/cilium,tgraf/cilium