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/mod.rs

@@ -215,7 +215,7 @@ pub trait BoardInteraction<'a> {
     async fn get_time(&mut self) -> DateTime<Utc>;
     async fn set_time(&mut self, time: &DateTime<FixedOffset>) -> FatResult<()>;
     async fn set_charge_indicator(&mut self, charging: bool) -> Result<(), FatError>;
-    async fn deep_sleep(&mut self, duration_in_ms: u64) -> !;
+    async fn deep_sleep_ms(&mut self, duration_in_ms: u64) -> !;
 
     fn is_day(&self) -> bool;
     //should be multsampled