Merge pull request #744 from aca/fix

Fix clusterctl config command

Author: k8s-ci-robot

docs/configuration.md

@@ -39,15 +39,15 @@ Note: You can use [the template file](../templates/cluster-template.yaml) by man
 ```bash
 # Using 'external-cloud-provider' flavor
 clusterctl config cluster capi-quickstart \
-  --flavor external-cloud-provider
+  --flavor external-cloud-provider \
   --kubernetes-version v1.18.2 \
   --control-plane-machine-count=3 \
   --worker-machine-count=1 \
   > capi-quickstart.yaml
 
 # Using 'without-lb' flavor
 clusterctl config cluster capi-quickstart \
-  --flavor without-lb
+  --flavor without-lb \
   --kubernetes-version v1.18.2 \
   --control-plane-machine-count=1 \
   --worker-machine-count=1 \