chore(niri): proper mouse accel speed

Changed files
+2 -2
.config
niri
+2 -2
.config/niri/config.kdl
···
mouse {
// off
// natural-scroll
-
// accel-speed 0.2
-
// accel-profile "flat"
+
accel-speed -0.5
+
accel-profile "flat"
// scroll-method "no-scroll"
}