First Workload with Bedrock: k8s version too old for AKS on westus2

[andrewDoing]

Describe the bug:
The k8s version is no longer supported on westus2, making the terraform apply command error out.

To Reproduce:
Follow the First Workload With Bedrock tutorial. The step where one uses the command terraform apply -var-file=bedrock.tfvars you will encounter the error.

Expected behavior:
The k8s version in Bedrock should be updated, or an AKS region that supports the older version should be used in the tutorial, to avoid an error.

Screenshots:
Error after running terraform apply -var-file=bedrock.tfvars

Oldest k8s version supported; from az aks get-versions --location westus2

Additional context:

Does this require updates to documentation?:
Yes, in the First Workload With Bedrock.

[andrebriggs]

@andrewDoing To unblock you you can set the in the kubernetes_version in terraform.tfvars file.

The default kubernetes_version variable in Terraform for azure-simple here and we should probably increase it to a more recent value.

Looks like #1442 will fix this issue. Thanks @jpflueger

cc @jmspring