Release Notes: Mention out-of-scope error message improvements
Release Notes: Mention out-of-scope error message improvements

Summary: as implemented for #11071.

Differential Revision: https://phabricator.haskell.org/D1498

sdiehl/ghc,mettekou/ghc,olsner/ghc,sgillespie/ghc,mcschroeder/ghc,gridaphobe/ghc,sdiehl/ghc,mcschroeder/ghc,shlevy/ghc,oldmanmike/ghc,mcschroeder/ghc,vTurbine/ghc,tjakway/ghcjvm,sdiehl/ghc,oldmanmike/ghc,tjakway/ghcjvm,mcschroeder/ghc,shlevy/ghc,gridaphobe/ghc,sgillespie/ghc,GaloisInc/halvm-ghc,ezyang/ghc,vikraman/ghc,mcschroeder/ghc,tjakway/ghcjvm,shlevy/ghc,snoyberg/ghc,sgillespie/ghc,ezyang/ghc,shlevy/ghc,vTurbine/ghc,sgillespie/ghc,tjakway/ghcjvm,sdiehl/ghc,ezyang/ghc,elieux/ghc,olsner/ghc,mettekou/ghc,vTurbine/ghc,ezyang/ghc,olsner/ghc,elieux/ghc,elieux/ghc,ezyang/ghc,vTurbine/ghc,gridaphobe/ghc,vTurbine/ghc,snoyberg/ghc,sgillespie/ghc,snoyberg/ghc,nushio3/ghc,mettekou/ghc,vikraman/ghc,sgillespie/ghc,oldmanmike/ghc,vikraman/ghc,snoyberg/ghc,vikraman/ghc,oldmanmike/ghc,vikraman/ghc,vikraman/ghc,mcschroeder/ghc,tjakway/ghcjvm,snoyberg/ghc,GaloisInc/halvm-ghc,sdiehl/ghc,vTurbine/ghc,sgillespie/ghc,oldmanmike/ghc,olsner/ghc,GaloisInc/halvm-ghc,elieux/ghc,mcschroeder/ghc,mettekou/ghc,nushio3/ghc,GaloisInc/halvm-ghc,oldmanmike/ghc,nushio3/ghc,snoyberg/ghc,olsner/ghc,gridaphobe/ghc,mettekou/ghc,sdiehl/ghc,vTurbine/ghc,nushio3/ghc,nushio3/ghc,elieux/ghc,gridaphobe/ghc,olsner/ghc,elieux/ghc,ezyang/ghc,oldmanmike/ghc,nushio3/ghc,GaloisInc/halvm-ghc,gridaphobe/ghc,snoyberg/ghc,ezyang/ghc,GaloisInc/halvm-ghc,mettekou/ghc,shlevy/ghc,olsner/ghc,elieux/ghc,nushio3/ghc,GaloisInc/halvm-ghc,shlevy/ghc,mettekou/ghc,gridaphobe/ghc,vikraman/ghc,sdiehl/ghc,shlevy/ghc,tjakway/ghcjvm,tjakway/ghcjvm