Info 2 [Q] reverting cm11

hi,i'd installed cm11 via cyanogenmod installer few days back but now i wanna go back to stock sense could u pls tell me how to do it?
i couldnt found the ruu for my device...it would be helpful if anyone could gimme link to the suitable ruu.Here are my devices details
model : htc one GSM
CID : htc__038
version : 4.20.707.7
Hboot : 1.56
S-on