Fix input command order (rotation_angle)

efd83cb8 added the rotation_angle command but it didn't insert it in
the proper place in the list, so the repeat_delay and repeat_rate
commands became unusable.

sway/commands/input.c

@@ -23,9 +23,9 @@ static const struct cmd_handler input_handlers[] = {
 	{ "middle_emulation", input_cmd_middle_emulation },
 	{ "natural_scroll", input_cmd_natural_scroll },
 	{ "pointer_accel", input_cmd_pointer_accel },
-	{ "rotation_angle", input_cmd_rotation_angle },
 	{ "repeat_delay", input_cmd_repeat_delay },
 	{ "repeat_rate", input_cmd_repeat_rate },
+	{ "rotation_angle", input_cmd_rotation_angle },
 	{ "scroll_button", input_cmd_scroll_button },
 	{ "scroll_factor", input_cmd_scroll_factor },
 	{ "scroll_method", input_cmd_scroll_method },