sms-gateway/config/statamic/markdown.php

<?php

return [

    /*
    |--------------------------------------------------------------------------
    | Markdown Parser Configurations
    |--------------------------------------------------------------------------
    |
    | Here you may define the configuration arrays for each markdown parser.
    | You may use the base CommonMark options as well as any extensions'
    | options here. The available options are in the CommonMark docs.
    |
    | https://statamic.dev/extending/markdown#configuration
    |
    */

    'configs' => [

        'default' => [
            // 'heading_permalink' => [
            //     'symbol' => '#',
            // ],
        ],

    ],

];