feat(tf): update terragrunt dependency github.com/terraform-aws-modules/terraform-aws-eks to v20.13.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
github.com/terraform-aws-modules/terraform-aws-eks	github	minor	v20.12.0 -> v20.13.0

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Release Notes

terraform-aws-modules/terraform-aws-eks (github.com/terraform-aws-modules/terraform-aws-eks)

### [`v20.13.0`](https://togithub.com/terraform-aws-modules/terraform-aws-eks/releases/tag/v20.13.0) [Compare Source](https://togithub.com/terraform-aws-modules/terraform-aws-eks/compare/v20.12.0...v20.13.0) ##### Features - Starting with `1.30`, do not use the cluster OIDC issuer URL by default in the identity provider config ([#​3055](https://togithub.com/terraform-aws-modules/terraform-aws-eks/issues/3055)) ([00f076a](https://togithub.com/terraform-aws-modules/terraform-aws-eks/commit/00f076ada4cd78c5c34b8be6e8eba44b628b629a))

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Configuration

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