message: Document fix for remote groups
diff: @@ -35,6 +35,7 @@ is based on [Keep a Changelog](https://keepachangelog.com).
  case or do unexpected things in the latter case. The stringification inspector
  now matches precisely on pointer types to stop the compiler from doing
  implicit conversions in the first place.
  +- Fixed a regression for remote groups introduced in 0.18.0-rc.1 (#1157).
  ## [0.18.0-rc.1] - 2020-09-09
  