docs: var gitlab_api_url for depandabot template

templates/python/dependancy_management/depandabot/README.md

@@ -16,7 +16,7 @@ The objective of the `depandabot` job is to provide a way to update the requirem
 | `PROJECT_PATH`           | The path to the project root directory.                                                                                                                       | `"."`                                        |
 | `REQUIREMENTS_FILE_PATH` | the path to the requirements file.                                                                                                                            | `"${PROJECT_PATH}/requirements.txt"`         |
 | `IMAGE_TAG`              | The default tag for the docker image. See [Python Docker Official Image](https://hub.docker.com/_/python) for supported tags and respective Dockerfile links. | `"latest"`                                   |
-| `PYTHON_SETUP`           | Bash commands to setup your python environment. Default rely on `requirements.txt` to install all dependencies.                                               | `"pip install -r ${REQUIREMENTS_FILE_PATH}"` |
+| `GITLAB_API_URL`           | The host name of the GitLab instance | `${CI_SERVER_HOST}` |
 
 ## Example of use