chore(README): add Thinkpad threshold in udev-rule list (#175)

* feat(udev): add udev rule for promptless charing threshold changes (ThinkPads only)

Allows user to modify the battery charge thresholds without password prompt. The rule was copied from [marcosdalvarez/thinkpad-battery-threshold-extension](https://gitlab.com/marcosdalvarez/thinkpad-battery-threshold-extension).

* feat(udev): Allow only wheel to change Thinkpad charging thresholds

* chore(README): add Thinkpad threshold in udev-rule list

README.md

@@ -34,6 +34,7 @@ Feel free to PR more rules into this repo! Ideally as they get added upstream we
 - Gaming controllers from [game-devices-udev](https://gitlab.com/jntesteves/game-devices-udev/) 
 - Google Titan USB keys
 - OpenRGB rules
+- [Thinkpad Battery Threshold](https://gitlab.com/marcosdalvarez/thinkpad-battery-threshold-extension) - change threshold without password prompt
 - [Yubikey support](https://github.com/Yubico/libfido2/tree/main/udev)
 - [Wooting Wootility](https://wooting.io/wootility)