Touch display sys path change

[alanjfogarty]

A quick note to say thank you for your work! I am a complete Luddite when it comes to coding, but I note that the more recent version of Raspberry OS has changed the folder structure from this; /sys/class/backlight/rpi-backlight/brightness

to this; /sys/class/backlight/rpi_backlight/brightness

Accordingly your script throws an unable to find error; ./timeout 10 event0

I tried updating the timeout.c on line 104 to the new location by that didn’t seem to work either. Any thoughts would be most appreciated and hope all is well

[MarSoft]

I've implemented a PR which properly fixes this issue — it will work with any available backlight device. @alanjfogarty, feel free to use my version until this PR is merged.