[DEVOPS-1059] shell.nix: filter .git files from fixStylishHaskell input
[DEVOPS-1059] shell.nix: filter .git files from fixStylishHaskell input

If there were any ref files in .git ending with the letters
"hs" (e.g. _epochs), they would get passed to stylish-haskell.

This changes the order of the find command arguments to fix that.

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