build(deps): bump github.com/hashicorp/terraform-plugin-docs from 0.20.1 to 0.21.0 (#33)

build(deps): bump github.com/hashicorp/terraform-plugin-docs

Bumps [github.com/hashicorp/terraform-plugin-docs](https://github.com/hashicorp/terraform-plugin-docs) from 0.20.1 to 0.21.0.
- [Release notes](https://github.com/hashicorp/terraform-plugin-docs/releases)
- [Changelog](https://github.com/hashicorp/terraform-plugin-docs/blob/main/CHANGELOG.md)
- [Commits](https://github.com/hashicorp/terraform-plugin-docs/compare/v0.20.1...v0.21.0)

---
updated-dependencies:
- dependency-name: github.com/hashicorp/terraform-plugin-docs
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

go.sum

@@ -491,8 +491,8 @@ github.com/hashicorp/terraform-exec v0.22.0 h1:G5+4Sz6jYZfRYUCg6eQgDsqTzkNXV+fP8
 github.com/hashicorp/terraform-exec v0.22.0/go.mod h1:bjVbsncaeh8jVdhttWYZuBGj21FcYw6Ia/XfHcNO7lQ=
 github.com/hashicorp/terraform-json v0.24.0 h1:rUiyF+x1kYawXeRth6fKFm/MdfBS6+lW4NbeATsYz8Q=
 github.com/hashicorp/terraform-json v0.24.0/go.mod h1:Nfj5ubo9xbu9uiAoZVBsNOjvNKB66Oyrvtit74kC7ow=
-github.com/hashicorp/terraform-plugin-docs v0.20.1 h1:Fq7E/HrU8kuZu3hNliZGwloFWSYfWEOWnylFhYQIoys=
-github.com/hashicorp/terraform-plugin-docs v0.20.1/go.mod h1:Yz6HoK7/EgzSrHPB9J/lWFzwl9/xep2OPnc5jaJDV90=
+github.com/hashicorp/terraform-plugin-docs v0.21.0 h1:yoyA/Y719z9WdFJAhpUkI1jRbKP/nteVNBaI3hW7iQ8=
+github.com/hashicorp/terraform-plugin-docs v0.21.0/go.mod h1:J4Wott1J2XBKZPp/NkQv7LMShJYOcrqhQ2myXBcu64s=
 github.com/hashicorp/terraform-plugin-framework v1.14.1 h1:jaT1yvU/kEKEsxnbrn4ZHlgcxyIfjvZ41BLdlLk52fY=
 github.com/hashicorp/terraform-plugin-framework v1.14.1/go.mod h1:xNUKmvTs6ldbwTuId5euAtg37dTxuyj3LHS3uj7BHQ4=
 github.com/hashicorp/terraform-plugin-framework-validators v0.17.0 h1:0uYQcqqgW3BMyyve07WJgpKorXST3zkpzvrOnf3mpbg=