rename deepsleep to deep_sleep_ms for clarity on expected duration

in main deep sleep was larger than required by a factor of 1000, fixed
this an renamed function to make expected duration count size obvious
from the name

rust/src/hal/v4_hal.rs

@@ -341,10 +341,10 @@ impl<'a> BoardInteraction<'a> for V4<'a> {
         self.charger.set_charge_indicator(charging)
     }
 
-    async fn deep_sleep(&mut self, duration_in_ms: u64) -> ! {
+    async fn deep_sleep_ms(&mut self, duration_in_ms: u64) -> ! {
         self.awake.set_low();
         self.charger.power_save();
-        self.esp.deep_sleep(duration_in_ms);
+        self.esp.deep_sleep_ms(duration_in_ms);
     }
 
     fn is_day(&self) -> bool {