Rust 1.80.0 lints (#6183)

* Fix lints

beacon_node/beacon_chain/src/beacon_chain.rs

@@ -1450,7 +1450,7 @@ impl<T: BeaconChainTypes> BeaconChain<T> {
     /// Returns the `BeaconState` the current slot (viz., `self.slot()`).
     ///
     ///  - A reference to the head state (note: this keeps a read lock on the head, try to use
-    ///  sparingly).
+    ///    sparingly).
     ///  - The head state, but with skipped slots (for states later than the head).
     ///
     ///  Returns `None` when there is an error skipping to a future state or the slot clock cannot