Fix typos (#3956)

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

zebra-state/src/service/watch_receiver.rs

@@ -19,7 +19,7 @@ use tokio::sync::watch;
 /// # Note
 ///
 /// If a lot of blocks are committed at the same time,
-/// the watch chanel will skip some block updates,
+/// the watch channel will skip some block updates,
 /// even though those updates were committed to the state.
 #[derive(Clone, Debug)]
 pub struct WatchReceiver<T> {

zebrad/src/components/sync.rs

@@ -776,7 +776,7 @@ where
 
     /// Handles a response for a requested block.
     ///
-    /// Returns `Ok` if the block was successfully verified and commited to the state, or if an
+    /// Returns `Ok` if the block was successfully verified and committed to the state, or if an
     /// expected error occurred, so that the synchronization can continue normally.
     ///
     /// Returns `Err` if an unexpected error occurred, to force the synchronizer to restart.