code: async def download_metadata_yaml(session, github_url):
      
      metadata_yaml_url = _build_metadata_yaml_url(github_url)
      async with session.get(metadata_yaml_url) as response:
          response.raise_for_status()
          yaml_data = await response.text()
      return yaml.safe_load(yaml_data)
docs: Download the metadata.yaml file from a technote's GitHub repository.