feat: update comments for gen_shared_list_size

Author: wathenjiang

tokio/src/runtime/task/list.rs

@@ -194,7 +194,8 @@ impl<S: 'static> OwnedTasks<S> {
     /// nodes in the intrusive linked list will diminish. Furthermore,
     /// the construction time of the sharded list will also increase with a higher number of shards.
     ///
-    /// For the above reasons, we set a maximum value for the shared list size `MAX_SHARED_LIST_SIZE`.
+    /// Due to the above reasons, we set a maximum value for the shared list size,
+    /// denoted as `MAX_SHARED_LIST_SIZE`.
     fn gen_shared_list_size(num_cores: usize) -> usize {
         const MAX_SHARED_LIST_SIZE: usize = 1 << 16;
         let mut size = 1;