chore(deps): update module github.com/hashicorp/terraform-plugin-go to v0.20.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
github.com/hashicorp/terraform-plugin-go	require	minor	v0.19.1 -> v0.20.0

---

Release Notes

hashicorp/terraform-plugin-go (github.com/hashicorp/terraform-plugin-go)

### [`v0.20.0`](https://togithub.com/hashicorp/terraform-plugin-go/releases/tag/v0.20.0) [Compare Source](https://togithub.com/hashicorp/terraform-plugin-go/compare/v0.19.1...v0.20.0) NOTES: - tfprotov5+tfprotov6: An upcoming release will require the FunctionServer implementation as part of ProviderServer. ([#​351](https://togithub.com/hashicorp/terraform-plugin-go/issues/351)) - Provider-defined function support is in technical preview and offered without compatibility promises until Terraform 1.8 is generally available. ([#​351](https://togithub.com/hashicorp/terraform-plugin-go/issues/351)) FEATURES: - tfprotov5+tfprotov6: Upgraded protocols and added types to support provider-defined functions ([#​351](https://togithub.com/hashicorp/terraform-plugin-go/issues/351))

---

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 becomes conflicted, 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.