Fix typo in installation docs
Fix typo in installation docs

Changed flag `--discovery-init` to `--init-discovery`
technosophos/flynn,tonicbupt/flynn,TribeMedia/flynn,felixrieseberg/flynn,rikur/flynn,ozum/flynn,flynn/flynn,jzila/flynn,benbjohnson/flynn,clifff/flynn,Brandywine2161/flynn,GrimDerp/flynn,josephglanville/flynn,GrimDerp/flynn,ozum/flynn,shads196770/flynn,clifff/flynn,flynn/flynn,schatt/flynn,whouses/flynn,mubassirhayat/flynn,justintung/flynn,GrimDerp/flynn,supermario/flynn,pkdevbox/flynn,benbjohnson/flynn,supermario/flynn,josephglanville/flynn,flynn/flynn,justintung/flynn,rikur/flynn,supermario/flynn,schatt/flynn,pkdevbox/flynn,mubassirhayat/flynn,philiplb/flynn,supermario/flynn,lmars/flynn,jzila/flynn,tonicbupt/flynn,technosophos/flynn,rikur/flynn,supermario/flynn,flynn/flynn,TribeMedia/flynn,kgrz/flynn,tonicbupt/flynn,pkdevbox/flynn,rikur/flynn,whouses/flynn,TribeMedia/flynn,TribeMedia/flynn,josephglanville/flynn,flynn/flynn,whouses/flynn,arekkas/flynn,kgrz/flynn,lmars/flynn,josephglanville/flynn,shads196770/flynn,clifff/flynn,rikur/flynn,felixrieseberg/flynn,kgrz/flynn,shads196770/flynn,arekkas/flynn,tonicbupt/flynn,shads196770/flynn,josephglanville/flynn,Brandywine2161/flynn,felixrieseberg/flynn,lmars/flynn,schatt/flynn,felixrieseberg/flynn,benbjohnson/flynn,GrimDerp/flynn,philiplb/flynn,justintung/flynn,pkdevbox/flynn,whouses/flynn,ozum/flynn,pkdevbox/flynn,kgrz/flynn,rikur/flynn,schatt/flynn,justintung/flynn,ozum/flynn,shads196770/flynn,GrimDerp/flynn,TribeMedia/flynn,schatt/flynn,benbjohnson/flynn,josephglanville/flynn,jzila/flynn,clifff/flynn,whouses/flynn,supermario/flynn,arekkas/flynn,pkdevbox/flynn,jzila/flynn,justintung/flynn,jzila/flynn,arekkas/flynn,technosophos/flynn,justintung/flynn,philiplb/flynn,benbjohnson/flynn,benbjohnson/flynn,technosophos/flynn,technosophos/flynn,Brandywine2161/flynn,ozum/flynn,tonicbupt/flynn,clifff/flynn,schatt/flynn,philiplb/flynn,TribeMedia/flynn,ozum/flynn,clifff/flynn,shads196770/flynn,lmars/flynn,mubassirhayat/flynn,GrimDerp/flynn,jzila/flynn,Brandywine2161/flynn,Brandywine2161/flynn,philiplb/flynn,lmars/flynn,kgrz/flynn,Brandywine2161/flynn,mubassirhayat/flynn,arekkas/flynn,kgrz/flynn,felixrieseberg/flynn,whouses/flynn