Bump github.com/hashicorp/terraform-plugin-go from 0.20.0 to 0.21.0

Bumps [github.com/hashicorp/terraform-plugin-go](https://github.com/hashicorp/terraform-plugin-go) from 0.20.0 to 0.21.0.
- [Release notes](https://github.com/hashicorp/terraform-plugin-go/releases)
- [Changelog](https://github.com/hashicorp/terraform-plugin-go/blob/main/CHANGELOG.md)
- [Commits](hashicorp/terraform-plugin-go@v0.20.0...v0.21.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

go.mod

@@ -9,7 +9,7 @@ require (
 	github.com/hashicorp/terraform-plugin-docs v0.18.0
 	github.com/hashicorp/terraform-plugin-framework v1.5.0
 	github.com/hashicorp/terraform-plugin-framework-validators v0.12.0
-	github.com/hashicorp/terraform-plugin-go v0.20.0
+	github.com/hashicorp/terraform-plugin-go v0.21.0
 	github.com/hashicorp/terraform-plugin-testing v1.6.0
 	github.com/redpanda-data/redpanda/src/go/rpk v0.0.0-20240122210157-821bd6d1fd31
 	golang.org/x/sync v0.6.0

go.sum

@@ -217,8 +217,8 @@ github.com/hashicorp/terraform-plugin-framework v1.5.0 h1:8kcvqJs/x6QyOFSdeAyEgs
 github.com/hashicorp/terraform-plugin-framework v1.5.0/go.mod h1:6waavirukIlFpVpthbGd2PUNYaFedB0RwW3MDzJ/rtc=
 github.com/hashicorp/terraform-plugin-framework-validators v0.12.0 h1:HOjBuMbOEzl7snOdOoUfE2Jgeto6JOjLVQ39Ls2nksc=
 github.com/hashicorp/terraform-plugin-framework-validators v0.12.0/go.mod h1:jfHGE/gzjxYz6XoUwi/aYiiKrJDeutQNUtGQXkaHklg=
-github.com/hashicorp/terraform-plugin-go v0.20.0 h1:oqvoUlL+2EUbKNsJbIt3zqqZ7wi6lzn4ufkn/UA51xQ=
-github.com/hashicorp/terraform-plugin-go v0.20.0/go.mod h1:Rr8LBdMlY53a3Z/HpP+ZU3/xCDqtKNCkeI9qOyT10QE=
+github.com/hashicorp/terraform-plugin-go v0.21.0 h1:VSjdVQYNDKR0l2pi3vsFK1PdMQrw6vGOshJXMNFeVc0=
+github.com/hashicorp/terraform-plugin-go v0.21.0/go.mod h1:piJp8UmO1uupCvC9/H74l2C6IyKG0rW4FDedIpwW5RQ=
 github.com/hashicorp/terraform-plugin-log v0.9.0 h1:i7hOA+vdAItN1/7UrfBqBwvYPQ9TFvymaRGZED3FCV0=
 github.com/hashicorp/terraform-plugin-log v0.9.0/go.mod h1:rKL8egZQ/eXSyDqzLUuwUYLVdlYeamldAHSxjUFADow=
 github.com/hashicorp/terraform-plugin-sdk/v2 v2.30.0 h1:X7vB6vn5tON2b49ILa4W7mFAsndeqJ7bZFOGbVO+0Cc=