LAB 11.2 - issues with the taint.yaml file

Hi all,

I'm working through chapter 11 exercise 11.2 "Using Taints to Control Pod Deployment" and received the following error when I ran the command. 

$ kubectl apply -f ./taint.yaml
error: error validating "./taint.yaml": error validating data: ValidationError(Deployment.spec): unknown field "spec" in io.k8s.api.apps.v1beta1.DeploymentSpec; if you choose to ignore these errors, turn validation off with --validate=false

I included my "taint.yaml" file for help troubleshooting.

apiVersion: apps/v1beta1
kind: Deployment
metadata:
  name: taint-deployment
spec:
  replicas: 8
  template:
    metadata:
      labels:
        app: nginx
  spec:
    containers:
    - name: nginx
      image: nginx:1.7.9
      ports:
      - containerPort: 80

Any help would be appreciated.

Cheers,

Sean