add jpg as default

Author: mambax7

xoops_version.php

@@ -135,7 +135,7 @@
     'description' => '_MI_MODULEBUILDER_CONFIG_MIMETYPES_IMAGE_DESC',
     'formtype'    => 'textbox',
     'valuetype'   => 'text',
-    'default'     => 'gif|jpeg|pjpeg|png',
+    'default'     => 'gif|jpeg|jpg|pjpeg|png',
 ];
 
 $modversion['config'][] = [