
**Apache Airflow version**:
1.10.13

**What happened**:
`force_logout_after` should be `force_log_out_after` in the code section https://github.com/apache/airflow/blob/master/airflow/settings.py#L372-L381. As `force_log_out_after` is actually used and written in https://github.com/apache/airflow/blob/c5700a56bb3b9a5b872bda0fe0d3de82b0128bdf/UPDATING.md#unify-user-session-lifetime-configuration.

**What you expected to happen**:
`force_logout_after` is renamed to `force_log_out_after`.
airflow/settings.py
"""Gets session timeout configs and handles outdated configs gracefully."""
    session_lifetime_minutes = conf.get('webserver', 'session_lifetime_minutes', fallback=None)
    session_lifetime_days = conf.get('webserver', 'session_lifetime_days', fallback=None)
    uses_deprecated_lifetime_configs = session_lifetime_days or conf.get(
        'webserver', 'force_logout_after', fallback=None
    )
    minutes_per_day = 24 * 60
    default_lifetime_minutes = '43200'
    if uses_deprecated_lifetime_configs and session_lifetime_minutes == default_lifetime_minutes:
        warnings.warn(
            '`session_lifetime_days` option from `[webserver]` section has been '
            'renamed to `session_lifetime_minutes`. The new option allows to configure '
            'session lifetime in minutes. The `force_logout_after` option has been removed '
            'from `[webserver]` section. Please update your configuration.',
            category=DeprecationWarning,
        )
        if session_lifetime_days:
            session_lifetime_minutes = minutes_per_day * int(session_lifetime_days)
    if not session_lifetime_minutes:
        session_lifetime_days = 30
        session_lifetime_minutes = minutes_per_day * session_lifetime_days
    logging.debug('User session lifetime is set to %s minutes.', session_lifetime_minutes)
    return int(session_lifetime_minutes)
def import_local_settings():