Add missing display_name parameter to update resource

Author: dmarcosl

cloudinary-core/src/main/java/com/cloudinary/Util.java

@@ -166,6 +166,9 @@ public static final void processWriteParameters(Map<String, Object> options, Map
         if (options.get("unique_display_name") != null) {
             params.put("unique_display_name", options.get("unique_display_name"));
         }
+        if (options.get("display_name") != null) {
+            params.put("display_name", options.get("display_name"));
+        }
         putObject("ocr", options, params);
         putObject("raw_convert", options, params);
         putObject("categorization", options, params);