Update src/lib.rs

Co-authored-by: Patrick José Pereira <patrickelectric@gmail.com>

src/lib.rs

@@ -473,7 +473,7 @@ fn set_pwm_channels_value_py(channels: Vec<PwmChannel>, value: u16) {
         You can use this method like :py:func:`set_pwm_channel_duty_cycle`.\n
         >>> navigator.set_pwm_channels_value([PwmChannel.Ch1, PwmChannel.Ch16], 0.5)"]
 fn set_pwm_channels_duty_cycle_py(channels: Vec<PwmChannel>, duty_cycle: f32) {
-    for i in 0..channels.len() {
+    for channel in channels {
         with_navigator!().set_pwm_channel_duty_cycle(channels[i].clone().into(), duty_cycle);
     }
 }