add createLink() returns jsDoc, #4235

docs/frontend_api/services_frontend_script_api.js.html

@@ -329,6 +329,7 @@ function FrontendScriptApi(startNote, currentNote, originEntity = null, $contain
      * @param {boolean} [params.showNotePath=false] - show also whole note's path as part of the link
      * @param {boolean} [params.showNoteIcon=false] - show also note icon before the title
      * @param {string} [params.title=] - custom link tile with note's title as default
+     * @returns {jQuery} - jQuery element with the link (wrapped in <span>)
      */
     this.createLink = linkService.createLink;