Rust 1.80.0 lints (#6183)

* Fix lints

beacon_node/operation_pool/src/max_cover.rs

@@ -7,7 +7,7 @@ use itertools::Itertools;
 /// * `item`: something that implements this trait
 /// * `element`: something contained in a set, and covered by the covering set of an item
 /// * `object`: something extracted from an item in order to comprise a solution
-/// See: https://en.wikipedia.org/wiki/Maximum_coverage_problem
+///   See: https://en.wikipedia.org/wiki/Maximum_coverage_problem
 pub trait MaxCover: Clone {
     /// The result type, of which we would eventually like a collection of maximal quality.
     type Object: Clone;