Simply Static - GitHub Webhook with webhook event

functions.php

<?php

add_filter( 'ssp_webhook_args', function( $args ) {
	// Get access token.
	$options       = get_option( 'simply-static' );
	$access_token = $options['github-personal-access-token'];

	// Setup body.
	$body = array(
		'event_type' => 'repository_dispatch',
	);

	// Modify arguments for POST request.
	$args = array(
		'headers' => array(
			'Authorization' => 'token ' . $access_token,
			'Accept'        => 'application/json',
		),
		'body' => wp_json_encode( $body )
	);
	return $args;
});