docs: update TF providers docs link and use a callout

terraform-reference/index.mdx

@@ -1,15 +1,19 @@
 ---
 title: "Kosli Terraform Provider"
 description: "Manage Kosli resources as Infrastructure-as-Code using Terraform."
 icon: "layer-group"
 ---
 
-The Kosli provider allows you to manage Kosli resources as Infrastructure-as-Code using Terraform. Use it to define and manage custom attestation types and integrate Kosli into your compliance workflows. The provider is officially registered at the [Terraform Registry](https://registry.terraform.io/providers/kosli-dev/kosli/latest).
+The Kosli provider allows you to manage Kosli resources as Infrastructure-as-Code using Terraform. Use it to define and manage custom attestation types and integrate Kosli into your compliance workflows.
+
+<Note>
+The provider is officially registered at the [Terraform Registry](https://registry.terraform.io/providers/kosli-dev/kosli/latest/docs).
+</Note>
 
 ## Requirements
 
 - Terraform >= 1.10
 - A Kosli account with API credentials
 
 ## Example usage
 
@@ -38,7 +42,7 @@
 
 ## Authentication
 
 The provider requires a Kosli API token and organization name for authentication. These can be configured in two ways (in order of precedence):
 
 1. **Provider configuration** - Set directly in your Terraform configuration
 2. **Environment variables** - Use `KOSLI_API_TOKEN` and `KOSLI_ORG`
@@ -53,12 +57,12 @@
 4. Copy the token and store it securely
 
 <Warning>
 API tokens grant full access to your Kosli organization. Store them securely and never commit them to version control.
 </Warning>
 
 ## Regional endpoints
 
 Kosli operates in multiple regions. Configure the `api_url` to match your organization's region:
 
 - **EU (Default)**: `https://app.kosli.com`
 - **US**: `https://app.us.kosli.com`
@@ -67,7 +71,7 @@
 
 ### Optional
 
 - `api_token` (String, Sensitive) Kosli API token for authentication. Can also be set via KOSLI_API_TOKEN environment variable.
 - `api_url` (String) Kosli API endpoint URL. Defaults to https://app.kosli.com (EU region). Use https://app.us.kosli.com for US region. Can also be set via KOSLI_API_URL environment variable.
 - `org` (String) Kosli organization name. Can also be set via KOSLI_ORG environment variable.
 - `timeout` (Number) HTTP client timeout in seconds. Defaults to 30 seconds.