Update HACKING.md
Update HACKING.md

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sopvop/cabal,kolmodin/cabal,sopvop/cabal,themoritz/cabal,themoritz/cabal,lukexi/cabal,bennofs/cabal,garetxe/cabal,headprogrammingczar/cabal,Heather/cabal,headprogrammingczar/cabal,garetxe/cabal,lukexi/cabal,thomie/cabal,gbaz/cabal,Heather/cabal,themoritz/cabal,bennofs/cabal,sopvop/cabal,thomie/cabal,kolmodin/cabal,mydaum/cabal,gbaz/cabal,mydaum/cabal