Fix DOMFilterFactory.#createUrl in MOZCENTRAL builds (18417 PR foll…

…ow-up)

Somehow I managed to mess up the URL creation relevant to e.g. MOZCENTRAL builds, which is breaking the pending PDF.js update in mozilla-central; sorry about that!

src/display/display_utils.js

@@ -139,7 +139,7 @@ class DOMFilterFactory extends BaseFilterFactory {
       }
       return `url(${this.#baseUrl}#${id})`;
     }
-    return `url(${id})`;
+    return `url(#${id})`;
   }
 
   addFilter(maps) {