Typo in README.md

[the-gigi]

This line:

echo "k8s_node_type=\"g6-standard-2\"" >> terraform.tfstate

Should be:

echo "k8s_node_type=\"g6-standard-2\"" >> terraform.tfvars

This can be very confusing for users that are familiar with terraform and they can end up with the wrong node type and/or corrupt the terraform state file.