Bump terraform-aws-modules/eks/aws from 20.31.4 to 20.31.6 (#443)

Bumps [terraform-aws-modules/eks/aws](https://github.com/terraform-aws-modules/terraform-aws-eks) from 20.31.4 to 20.31.6.
- [Release notes](https://github.com/terraform-aws-modules/terraform-aws-eks/releases)
- [Changelog](https://github.com/terraform-aws-modules/terraform-aws-eks/blob/master/CHANGELOG.md)
- [Commits](terraform-aws-modules/terraform-aws-eks@v20.31.4...v20.31.6)

---
updated-dependencies:
- dependency-name: terraform-aws-modules/eks/aws
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

karpenter.tf

@@ -6,7 +6,7 @@ module "karpenter" {
   count = var.karpenter_enabled ? 1 : 0
 
   source  = "terraform-aws-modules/eks/aws//modules/karpenter"
-  version = "20.31.4"
+  version = "20.31.6"
 
   cluster_name = var.environment_name