update link to MonadFail proposal
update link to MonadFail proposal

[skip ci]

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