Hello,

In Airflow 2, we've moved some configuration options to the new section. We also changed the names of some of the configuration options. This is confusing for users who are familiar with the old option and section names.  It would be great if we could add information to the documentation that points to the new name of the options.

https://github.com/apache/airflow/blob/8f48f12128e0d985c6de2603902524859fecbca8/airflow/configuration.py#L139-L169

> 'The {old} option in [{section}] has been renamed to {new}
> 'The {old_key} option in [{old_section}] has been moved to the {new_key} option in '
> '[{new_section}]

Best regards,
Kamil Breguła

airflow/configuration.py
option = self._get_cmd_option(section, key)
        if option:
            return option
        if deprecated_section:
            option = self._get_cmd_option(deprecated_section, deprecated_key)
            if option:
                self._warn_deprecate(section, key, deprecated_section, deprecated_key)
                return option
        return None
    def _get_option_from_config_file(self, deprecated_key, deprecated_section, key, kwargs, section):
        
        if super().has_option(section, key):
            
            
            return expand_env_var(super().get(section, key, **kwargs))
        if deprecated_section:
            if super().has_option(deprecated_section, deprecated_key):
                self._warn_deprecate(section, key, deprecated_section, deprecated_key)
                return expand_env_var(super().get(deprecated_section, deprecated_key, **kwargs))
        return None
    def _get_environment_variables(self, deprecated_key, deprecated_section, key, section):