:sparkles: adding materials to more post types

plugins/cia-post-types/includes/custom-taxonomies.php

@@ -1,6 +1,6 @@
 <?php
     function create_materials_taxonomy() {
-        $post_types_that_show_materials = [ 'artist', 'exhibition', 'event' ];
+        $post_types_that_show_materials = [ 'artist', 'exhibition', 'event', 'guide', 'publication', 'object', 'short' ];
         register_taxonomy('material', $post_types_that_show_materials, ['label' => 'Materials']);
     }
     function create_types_taxonomy() {