update readme

examples/full-cluster-tf-upgrade/1.31/README.md

@@ -52,7 +52,7 @@ private_subnets = [
 ```
 
 We add the tag `"kubernetes.io/cluster/{cluster_name}" = "shared"` in order for the node groups to pick up the
-cluster subnets.  This is on the new `container` ubnet.
+cluster subnets.  This is on the new `container` subnet.
 
 For creating a service which uses load balancers (ELB, ALB, or NLB), the last tag listed here is needed
 `"kubernetes.io/role/internal-elb" = 1`. This is only one tag for all EKS, not one per cluster, and it should apply
@@ -75,7 +75,7 @@ Here is a sample file:
 
 ```hcl
 cluster_name           = "org-project-env"
-cluster_version        = "1.28"
+cluster_version        = "1.31"
 region                 = "us-gov-east-1"
 domain                 = "org-project-env.env.domain.census.gov"
 contact_email          = "org-project-env-group-mailing-list@census.gov"