message: Document work-stealing parameter lookup fix
diff: @@ -29,6 +29,7 @@ is based on [Keep a Changelog](https://keepachangelog.com).
  `T` itself or `expected<T>` for calling a constructor of `result<T>`. To fix
  the ambiguity, `result<T>` now accepts any type that allows constructing a `T`
  internally without requiring a type conversion to `T` as an argument (#1245).
  +- Fix configuration parameter lookup for the `work-stealing` scheduler policy.
  ## [0.18.2] - 2021-03-26
  