add danish translation
add danish translation

jackycute/HackMD,Yukaii/hackmd,ironhack/hackmd,Rwing/hackmd,PeterDaveHello/hackmd,Rwing/hackmd,ironhack/hackmd,jackycute/HackMD,hackmdio/hackmd,Yukaii/hackmd,ironhack/hackmd,PeterDaveHello/hackmd,PeterDaveHello/hackmd,hackmdio/hackmd,hackmdio/hackmd,Rwing/hackmd,Yukaii/hackmd,jackycute/HackMD