Update justfile

Author: wiiznokes

justfile

@@ -3,7 +3,7 @@ set windows-powershell := true
 export FAN_CONTROL_VERSION := "2025.3.0"
 export FAN_CONTROL_COMMIT := `git rev-parse --short HEAD`
 rootdir := ''
-prefix := ''
+prefix := '/usr'
 debug := '0'
 name := 'fan-control'
 appid := 'io.github.wiiznokes.' + name