Update docs (43df52f) (#29)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

README.md

@@ -106,6 +106,7 @@ For zip archive update, configure the "OTA Release" step as
 |                                                       INPUT                                                       |  TYPE  | REQUIRED |  DEFAULT  |                                                                           DESCRIPTION                                                                           |
 |-------------------------------------------------------------------------------------------------------------------|--------|----------|-----------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------|
 |                      <a name="input_artifacts_dir"></a>[artifacts_dir](#input_artifacts_dir)                      | string |  false   |           |                                                Path to the directory where <br>OTA update artifacts are stored                                                  |
+|                         <a name="input_backend_url"></a>[backend_url](#input_backend_url)                         | string |  false   |           |                   URL of the backend server <br>that runs the OTA update <br>service. If not provided, the <br>Thistle service will be used                     |
 | <a name="input_base_install_path_on_device"></a>[base_install_path_on_device](#input_base_install_path_on_device) | string |  false   |           | Path to base directory on <br>device file system where OTA <br>update artifacts will be installed. <br>Required if release_type is "file" <br>or "zip_archive"  |
 |          <a name="input_persist_dir_on_device"></a>[persist_dir_on_device](#input_persist_dir_on_device)          | string |   true   |           |                                                  Path to the directory where <br>the device can persist data                                                    |
 |           <a name="input_project_access_token"></a>[project_access_token](#input_project_access_token)            | string |   true   |           |                             Project access token can be <br>obtained from the project settings <br>page in Thistle Control Center                               |