Document DescribeInstanceTypeOfferings permission (#689)

Complements #670

Author: 0x2b3bfa0

docs/guides/permissions/aws/main.tf

@@ -44,6 +44,7 @@ data "aws_iam_policy_document" "task" {
       "ec2:DeleteSecurityGroup",
       "ec2:DescribeAutoScalingGroups",
       "ec2:DescribeImages",
+      "ec2:DescribeInstanceTypeOfferings",
       "ec2:DescribeInstances",
       "ec2:DescribeKeyPairs",
       "ec2:DescribeLaunchTemplates",