add it to the settingscontroller as well

Signed-off-by: Simon L <szaimen@e.mail.de>

lib/Controller/SettingsController.php

@@ -38,6 +38,7 @@ class SettingsController extends Controller {
 	// TODO adapt overview generation if we add more font mimetypes
 	public const FONT_MIME_TYPES = [
 		'font/ttf',
+		'application/font-sfnt',
 		'font/opentype',
 		'application/vnd.oasis.opendocument.formula-template',
 	];