"Steam Linux Runtime 3.0 (sniper)" in Steam menu (and library)

[g572staem]

Your system information

• Steam client version (build number or date): Steam Version: 1694466342 Steam Client Build Date: Tue, Sep 12 8:49 AM UTC +12:00 Steam Web Build Date: Sun, Sep 10 11:01 AM UTC +12:00 Steam API Version: SteamClient020
• Distribution (e.g. Ubuntu): Ubuntu 20.04.6 LTS (xubuntu)
• Opted into Steam client beta?: No
• Have you checked for system updates?: Yes
• Logs: not relevant
• GPU: Nvidia

Please describe your issue in as much detail as possible:

In Steam menu (like the windows systray one), this appears, and does not make sense: Steam Linux Runtime 3.0 (sniper)

this also appears, which is expected: Counter-Strike 2