chore(deps): update terraform terraform-google-modules/cloud-nat/google to v4

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
terraform-google-modules/cloud-nat/google (source)	module	major	~> 3.0 -> ~> 4.0

---

Release Notes

terraform-google-modules/terraform-google-cloud-nat

### [`v4.0.0`](https://togithub.com/terraform-google-modules/terraform-google-cloud-nat/blob/HEAD/CHANGELOG.md#​400-httpsgithubcomterraform-google-modulesterraform-google-cloud-natcomparev300v400-2023-06-12) [Compare Source](https://togithub.com/terraform-google-modules/terraform-google-cloud-nat/compare/v3.0.0...v4.0.0) ##### ⚠ BREAKING CHANGES - **removes nat_ip_allocate_option:** add dynamic port mapping ([#​73](https://togithub.com/terraform-google-modules/terraform-google-cloud-nat/issues/73)) ##### Features - **removes nat_ip_allocate_option:** add dynamic port mapping ([#​73](https://togithub.com/terraform-google-modules/terraform-google-cloud-nat/issues/73)) ([0cf1d69](https://togithub.com/terraform-google-modules/terraform-google-cloud-nat/commit/0cf1d697e55153f46e58bd2cd9e518d9ad55ae36))

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• [ ] If you want to rebase/retry this PR, check this box

---

This PR has been generated by Mend Renovate. View repository job log here.

[dpebot]

/gcbrun

[dpebot]

/gcbrun