Documentation/v2: Add newline before heading in faq.md
Documentation/v2: Add newline before heading in faq.md

Minor rewrite to the heading text for clarity.

Matches downstream coreos-inc/coreos-pages#648 and
coreos-inc/coreos-pages#649.

dnaeon/etcd,sinsharat/etcd,endocode/etcd,linuxcer/etcd,OyTao/etcd_learning,jonboulle/etcd,a-robinson/etcd,westhood/etcd,mickep76/etcd,mickep76/etcd,luxas/etcd,gyuho/etcd,YuleiXiao/etcd,etcd-io/etcd,insequent/etcd,glycerine/etcd,wantonsolutions/dinv-etcd,yudai/etcd,gyuho/etcd,etcd-io/etcd,rchicoli/etcd,mqliang/etcd,armstrongli/etcd,wantonsolutions/dinv-etcd,swingbach/etcd,mqliang/etcd,tguangch/etcd,visheshnp/etcd,yudai/etcd,akauppi/etcd,OyTao/etcd_learning,bdarnell/etcd,coreos/etcd,coreos/etcd,whuwxl/etcd,cockroachdb/etcd,nekto0n/etcd,westhood/etcd,vimalk78/etcd,heyitsanthony/etcd,sebrandon1/etcd,ktateish/etcd,nekto0n/etcd,rnaveiras/etcd,bluebreezecf/etcd,YuleiXiao/etcd,qqsun8819/etcd,StorReduce/etcd,ktateish/etcd,etcd-io/etcd,linuxcer/etcd,sofuture/etcd,jlamillan/etcd,lumjjb/etcd,chipironcin/etcd,purpleidea/etcd,swingbach/etcd,akauppi/etcd,plasticbox/etcd,glevand/coreos--etcd,joshix/etcd,armstrongli/etcd,glycerine/etcd,handsomesun/etcd,xiang90/etcd,bluebreezecf/etcd,mqliang/etcd,zaphod-concur/etcd,insequent/etcd,ajityagaty/etcd,mkumatag/etcd,luxas/etcd,handsomesun/etcd,purpleidea/etcd,heyitsanthony/etcd,hongchaodeng/etcd,jonboulle/etcd,dnaeon/etcd,li-ang/etcd,ravigadde/etcd,chipironcin/etcd,hongchaodeng/etcd,jlamillan/etcd,tguangch/etcd,a-robinson/etcd,wantonsolutions/dinv-etcd,qqsun8819/etcd,mkumatag/etcd,mkumatag/etcd,li-ang/etcd,whuwxl/etcd,StorReduce/etcd,rnaveiras/etcd,xiang90/etcd,endocode/etcd,vimalk78/etcd,visheshnp/etcd,sofuture/etcd,sinsharat/etcd,joshix/etcd,rnaveiras/etcd,dannysauer/etcd,fanminshi/etcd,ravigadde/etcd,bdarnell/etcd,sebrandon1/etcd,zaphod-concur/etcd,ajityagaty/etcd,cockroachdb/etcd,rchicoli/etcd,plasticbox/etcd,lorneli/etcd,lumjjb/etcd,dannysauer/etcd,glevand/coreos--etcd,fanminshi/etcd,CrazyJvm/etcd,lorneli/etcd,ajityagaty/etcd,CrazyJvm/etcd