Fix indentation rule for nix.kak
Fix indentation rule for nix.kak

Somasis/kakoune,mawww/kakoune,alexherbo2/kakoune,jkonecny12/kakoune,danr/kakoune,casimir/kakoune,mawww/kakoune,alexherbo2/kakoune,lenormf/kakoune,lenormf/kakoune,alexherbo2/kakoune,jkonecny12/kakoune,danr/kakoune,mawww/kakoune,casimir/kakoune,Somasis/kakoune,danr/kakoune,lenormf/kakoune,Somasis/kakoune,casimir/kakoune,jkonecny12/kakoune,lenormf/kakoune,alexherbo2/kakoune,danr/kakoune,mawww/kakoune,jkonecny12/kakoune,casimir/kakoune,Somasis/kakoune