[CODEOWNERS] Make @domenkozar owner of nixpkgs-src.json
[CODEOWNERS] Make @domenkozar owner of nixpkgs-src.json

input-output-hk/cardano-sl,input-output-hk/cardano-sl,input-output-hk/pos-haskell-prototype,input-output-hk/cardano-sl,input-output-hk/pos-haskell-prototype,input-output-hk/pos-haskell-prototype,input-output-hk/cardano-sl