Update valid regions

Update the valid regions with regions that now support fargate.

cmd/root.go

@@ -45,7 +45,7 @@ CPU (CPU Units)    Memory (MiB)
 4096               8192 through 30720 in 1GiB increments
 `)
 
-var validRegions = []string{"us-east-1", "us-east-2", "us-west-1", "us-west-2", "ap-southeast-1", "ap-southeast-2", "ap-northeast-1", "eu-central-1", "eu-west-1", "eu-west-2"}
+var validRegions = []string{"ap-northeast-1", "ap-northeast-2", "ap-south-1", "ap-southeast-1", "ap-southeast-2", "ca-central-1", "eu-central-1", "eu-west-1", "eu-west-2", "us-east-1", "us-east-2", "us-west-1", "us-west-2"}
 
 var (
 	clusterName string