Update module hashicorp/terraform-plugin-sdk to v1.6.0 (#11802)

Co-authored-by: WhiteSource Renovate <renovatebot@gmail.com>

go.mod

@@ -13,7 +13,7 @@ require (
 	github.com/hashicorp/go-cleanhttp v0.5.1
 	github.com/hashicorp/go-multierror v1.0.0
 	github.com/hashicorp/go-version v1.2.0
-	github.com/hashicorp/terraform-plugin-sdk v1.5.0
+	github.com/hashicorp/terraform-plugin-sdk v1.6.0
 	github.com/hashicorp/vault v0.10.4
 	github.com/jen20/awspolicyequivalence v1.1.0
 	github.com/json-iterator/go v1.1.8 // indirect

go.sum

@@ -247,8 +247,8 @@ github.com/hashicorp/terraform-json v0.3.1 h1:vRiOLck4YX4UqzljVhdQKsVLixX4L+Pgnm
 github.com/hashicorp/terraform-json v0.3.1/go.mod h1:MdwQStcJb00ht55L/2YH0ypAO9RNtczJ1MaUlf+gJcg=
 github.com/hashicorp/terraform-plugin-sdk v1.4.1 h1:REgN6WbySD6aIYdF6Uob3ic4eQkfh4NXSWU/casmgb4=
 github.com/hashicorp/terraform-plugin-sdk v1.4.1/go.mod h1:H5QLx/uhwfxBZ59Bc5SqT19M4i+fYt7LZjHTpbLZiAg=
-github.com/hashicorp/terraform-plugin-sdk v1.5.0 h1:hzac/oigJkGup0kI+PwBGI4/fvG7Na8kM8j9xCBrmWo=
-github.com/hashicorp/terraform-plugin-sdk v1.5.0/go.mod h1:H5QLx/uhwfxBZ59Bc5SqT19M4i+fYt7LZjHTpbLZiAg=
+github.com/hashicorp/terraform-plugin-sdk v1.6.0 h1:Um5hsAL7kKsfTHtan8lybY/d03F2bHu4fjRB1H6Ag4U=
+github.com/hashicorp/terraform-plugin-sdk v1.6.0/go.mod h1:H5QLx/uhwfxBZ59Bc5SqT19M4i+fYt7LZjHTpbLZiAg=
 github.com/hashicorp/terraform-svchost v0.0.0-20191011084731-65d371908596 h1:hjyO2JsNZUKT1ym+FAdlBEkGPevazYsmVgIMw7dVELg=
 github.com/hashicorp/terraform-svchost v0.0.0-20191011084731-65d371908596/go.mod h1:kNDNcF7sN4DocDLBkQYz73HGKwN1ANB1blq4lIYLYvg=
 github.com/hashicorp/vault v0.10.4 h1:4x0lHxui/ZRp/B3E0Auv1QNBJpzETqHR2kQD3mHSBJU=