Update module github.com/hashicorp/terraform-plugin-sdk/v2 to v2.20.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
github.com/hashicorp/terraform-plugin-sdk/v2	require	minor	v2.19.0 -> v2.20.0

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Release Notes

hashicorp/terraform-plugin-sdk

### [`v2.20.0`](https://togithub.com/hashicorp/terraform-plugin-sdk/releases/tag/v2.20.0) [Compare Source](https://togithub.com/hashicorp/terraform-plugin-sdk/compare/v2.19.0...v2.20.0) NOTES: - helper/logging: Existing `NewTransport()` is now deprecated in favour of using the new `NewLoggingHTTPTransport()` or `NewSubsystemLoggingHTTPTransport()` ([#​1006](https://togithub.com/hashicorp/terraform-plugin-sdk/issues/1006)) FEATURES: - helper/logging: New `NewLoggingHTTPTransport()` and `NewSubsystemLoggingHTTPTransport()` functions, providing `http.RoundTripper` Transport implementations that log request/response using [terraform-plugin-log](https://pkg.go.dev/github.com/hashicorp/terraform-plugin-log) ([#​546](https://togithub.com/hashicorp/terraform-plugin-sdk/issues/546)) ([#​1006](https://togithub.com/hashicorp/terraform-plugin-sdk/issues/1006))

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