Fix small typo

Author: markvincze

docs/08-bootstrapping-kubernetes-controllers.md

@@ -44,7 +44,7 @@ sudo mkdir -p /var/lib/kubernetes/
 sudo mv ca.pem ca-key.pem kubernetes-key.pem kubernetes.pem encryption-config.yaml /var/lib/kubernetes/
 ```
 
-The instance internal IP address will be used advertise the API Server to members of the cluster. Retrieve the internal IP address for the current compute instance:
+The instance internal IP address will be used to advertise the API Server to members of the cluster. Retrieve the internal IP address for the current compute instance:
 
 ```
 INTERNAL_IP=$(curl -s -H "Metadata-Flavor: Google" \