fix(deps): update module github.com/hashicorp/terraform-json to v0.21.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
github.com/hashicorp/terraform-json	v0.19.0 -> v0.21.0

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Release Notes

hashicorp/terraform-json (github.com/hashicorp/terraform-json)

### [`v0.21.0`](https://togithub.com/hashicorp/terraform-json/releases/tag/v0.21.0) [Compare Source](https://togithub.com/hashicorp/terraform-json/compare/v0.20.0...v0.21.0) ENHANCEMENTS - Initial support for provider-defined functions from `providers schema -json` by [@​bflad](https://togithub.com/bflad) in [https://github.com/hashicorp/terraform-json/pull/119](https://togithub.com/hashicorp/terraform-json/pull/119) **Full Changelog**: https://github.com/hashicorp/terraform-json/compare/v0.20.0...v0.21.0 ### [`v0.20.0`](https://togithub.com/hashicorp/terraform-json/releases/tag/v0.20.0) [Compare Source](https://togithub.com/hashicorp/terraform-json/compare/v0.19.0...v0.20.0) ENHANCEMENTS: - Add `ReplacePaths` to `Change` struct by [@​sebasslash](https://togithub.com/sebasslash) in [https://github.com/hashicorp/terraform-json/pull/117](https://togithub.com/hashicorp/terraform-json/pull/117) **Full Changelog**: https://github.com/hashicorp/terraform-json/compare/v0.19.0...v0.20.0

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