This update gives the main menu sidebar an indicator that shows that new news items have been published there since the last time you played. It is only visible once, until you leave the main menu, or even more news are published.
Minor update
Source: Steam Community (opens in a new tab)
Build and release context
Steam update times within 24 hours of this post. Matching dates do not confirm which build it describes.
Build 20236487 · public branch
Steam updated · First observed