Missing "-" in readme.md

[cryptomonk]

Usage Example:

sudo ./amdgpu-pro-fans.sh s 80 That would set all of your fan speeds to 80 percent of their maximum speed. The argument works perfectly as of the current stable release.

sudo ./amdgpu-pro-fans.sh -----> "-" s 80

[joostwestra]

Confirmed works fine with the -s and not with s
Very confusion readme right now
As it gives no error with the wrong command