docs: mark name as required for data source github_organization (#2330)

Co-authored-by: Keegan Campbell <[email protected]>

Author: stefanfreitag

website/docs/d/organization.html.markdown

@@ -19,7 +19,8 @@ data "github_organization" "example" {
 
 ## Argument Reference
 
-* `ignore_archived_repos` - Whether or not to include archived repos in the `repositories` list
+* `name` - (Required) The name of the organization.
+* `ignore_archived_repos` - (Optional) Whether or not to include archived repos in the `repositories` list.
 
 ## Attributes Reference