Not even a week after the last release, another stable Steam-Client 14.09.2021 has been released for Linux with even more improvements and bugfixes:

Steam Client Update, September 14

A new Steam client has been released and will be automatically downloaded.

Library

Stop displaying a demo banner in the header for certain titles that are not demos.

Linux

Scout runtime 0.20210906.1:
Improve compatibility with deprecated environment variable setting SDL_AUDIODRIVER=pulse (steam-runtime#452, steam-runtime#459)
Use readlink -f instead of realpath for better compatibility with Ubuntu 14.04
Improve handling of OSs that do not install zenity
Heavy runtime 0.20210907.0:
Add libcups.so to the runtime (steam-for-linux#8031)

Steam Input

Fix an issue with analog controls in Dynasty Warriors 9