Update zsh prompt example in docs
Update zsh prompt example in docs

bezhermoso/powerline,DoctorJellyface/powerline,lukw00/powerline,Luffin/powerline,blindFS/powerline,magus424/powerline,kenrachynski/powerline,EricSB/powerline,s0undt3ch/powerline,Luffin/powerline,lukw00/powerline,S0lll0s/powerline,wfscheper/powerline,xxxhycl2010/powerline,QuLogic/powerline,cyrixhero/powerline,bartvm/powerline,darac/powerline,kenrachynski/powerline,keelerm84/powerline,bartvm/powerline,S0lll0s/powerline,lukw00/powerline,xfumihiro/powerline,areteix/powerline,russellb/powerline,seanfisk/powerline,Liangjianghao/powerline,QuLogic/powerline,dragon788/powerline,Liangjianghao/powerline,cyrixhero/powerline,xfumihiro/powerline,blindFS/powerline,firebitsbr/powerline,blindFS/powerline,seanfisk/powerline,Luffin/powerline,prvnkumar/powerline,magus424/powerline,bezhermoso/powerline,xxxhycl2010/powerline,kenrachynski/powerline,S0lll0s/powerline,IvanAli/powerline,dragon788/powerline,IvanAli/powerline,areteix/powerline,cyrixhero/powerline,s0undt3ch/powerline,EricSB/powerline,junix/powerline,DoctorJellyface/powerline,EricSB/powerline,DoctorJellyface/powerline,bezhermoso/powerline,keelerm84/powerline,wfscheper/powerline,QuLogic/powerline,wfscheper/powerline,russellb/powerline,darac/powerline,darac/powerline,magus424/powerline,russellb/powerline,Liangjianghao/powerline,prvnkumar/powerline,junix/powerline,dragon788/powerline,prvnkumar/powerline,xfumihiro/powerline,firebitsbr/powerline,junix/powerline,xxxhycl2010/powerline,areteix/powerline,firebitsbr/powerline,s0undt3ch/powerline,seanfisk/powerline,IvanAli/powerline,bartvm/powerline