WordPress has recently released its latest update: WordPress 4.1.1 version. This is a maintenance release for all previous versions. According to WordPress.org, this version fixes 21 bugs including some browsers and TinyMCE issues. For more info about this update, please read this blog post from WordPress.org.
Your WordPress may have been updated automatically (depending on the existing version of WordPress you have. Auto updates should be taken place within 12 hours). But to ensure your WordPress website is updated, it is recommended to log in to your site and check if update is required. To update, log in to your WordPress dashboard and the update button is listed on top of the browser. And we strongly recommend you to perform a full site backup before updating your WordPress site.