chore: improve coderd_license docs (#140)

Author: aslilac

docs/resources/license.md

@@ -4,19 +4,29 @@ page_title: "coderd_license Resource - terraform-provider-coderd"
 subcategory: ""
 description: |-
   A license for a Coder deployment.
-  It's recommended to create multiple instances of this resource when updating a license. Modifying an existing license will cause the resource to be replaced, which may result in a brief unlicensed period.
+  It's recommended to set create_before_destroy https://developer.hashicorp.com/terraform/language/meta-arguments/lifecycle#create_before_destroy on license resources. Without setting this, Terraform will remove the old license before adding the updated license. This will result in a temporary disruption to your users; during which they may be unable to use features that require a license.
   Terraform does not guarantee this resource will be created before other resources or attributes that require a licensed deployment. The depends_on meta-argument is instead recommended.
 ---
 
 # coderd_license (Resource)
 
 A license for a Coder deployment.
 
-It's recommended to create multiple instances of this resource when updating a license. Modifying an existing license will cause the resource to be replaced, which may result in a brief unlicensed period.
+It's recommended to set [`create_before_destroy`](https://developer.hashicorp.com/terraform/language/meta-arguments/lifecycle#create_before_destroy) on license resources. Without setting this, Terraform will remove the old license before adding the updated license. This will result in a temporary disruption to your users; during which they may be unable to use features that require a license.
 
 Terraform does not guarantee this resource will be created before other resources or attributes that require a licensed deployment. The `depends_on` meta-argument is instead recommended.
 
+## Example Usage
 
+```terraform
+resource "coderd_license" "license" {
+  license = "<…>"
+
+  lifecycle {
+    create_before_destroy = true
+  }
+}
+```
 
 <!-- schema generated by tfplugindocs -->
 ## Schema

examples/resources/coderd_license/resource.tf

@@ -0,0 +1,7 @@
+resource "coderd_license" "license" {
+  license = "<…>"
+
+  lifecycle {
+    create_before_destroy = true
+  }
+}

internal/provider/license_resource.go

@@ -39,9 +39,12 @@ func (r *LicenseResource) Metadata(ctx context.Context, req resource.MetadataReq
 
 func (r *LicenseResource) Schema(ctx context.Context, req resource.SchemaRequest, resp *resource.SchemaResponse) {
 	resp.Schema = schema.Schema{
-		MarkdownDescription: "A license for a Coder deployment.\n\nIt's recommended to create multiple instances of this " +
-			"resource when updating a license. Modifying an existing license will cause the resource to be replaced, " +
-			"which may result in a brief unlicensed period.\n\n" +
+		MarkdownDescription: "A license for a Coder deployment.\n\nIt's recommended to set " +
+			"[`create_before_destroy`](https://developer.hashicorp.com/terraform/language/meta-arguments/lifecycle#create_before_destroy) " +
+			"on license resources. Without setting this, Terraform will remove the old " +
+			"license before adding the updated license. This will result in a temporary " +
+			"disruption to your users; during which they may be unable to use features " +
+			"that require a license.\n\n" +
 			"Terraform does not guarantee this resource " +
 			"will be created before other resources or attributes that require a licensed deployment. " +
 			"The `depends_on` meta-argument is instead recommended.",