Describe the bug

Terraform-docs doesn't document whether a variable or an output is sensitive.

How can we reproduce it?

Create a terraform variable like this:

variable "password" {
description = "Password"
sensitive = true
type = string
}

Run terraform-docs:

terraform-docs.exe markdown .

Expected behavior

## Inputs

| Name | Description | Type | Default | Required | Sensitive |
|------|-------------|------|---------|:--------:|-----|
| <a name="input_password"></a> [password](#input\password) | Password | `string` | n/a | yes | yes |

Actual behavior

## Inputs

| Name | Description | Type | Default | Required |
|------|-------------|------|---------|:--------:|-----|
| <a name="input_password"></a> [password](#input\password) | Password | `string` | n/a | yes |

Further information

This error also occurs when using the terraform-docs json command.

Environment information

terraform-docs version v0.18.0 228c7a7 windows/amd64