user guide has dead link to MonadFailProposal on prime.haskell.org
Summary
Location of documentation issue: GHC user guide
https://downloads.haskell.org/ghc/latest/docs/html/users_guide/using-warnings.html?highlight=monadfail#ghc-flag--Wmissing-monadfail-instances points to https://prime.haskell.org/wiki/Libraries/Proposals/MonadFail which does not seem to exist.
When I search for "MonadFail Proposal", the top result is https://wiki.haskell.org/MonadFail_Proposal which exists, but says it's been moved to the non-existing page.