design.md: fixed anchor reference
design.md: fixed anchor reference

The #Drivers reference needed to be #drivers in order for the anchor to work correctly.

Signed-off-by: Lee Calcote <cb0cdb40dd14c0af36c82222287471cd2fa7d692@gmail.com>

thaJeztah/docker,paralin/docker,mahak/docker,jthelin/docker,nawawi/docker,yosifkit/docker,yosifkit/docker,Mokolea/docker,yosifkit/docker,nalind/docker,moby/moby,nalind/docker,thaJeztah/docker,konstruktoid/docker-upstream,trebonian/docker,Ramzec/docker,moul/docker,gnailuy/docker,yosifkit/docker,AkihiroSuda/docker,cpuguy83/docker,jimjag/docker,moul/docker,cpuguy83/docker,AkihiroSuda/docker,AkihiroSuda/docker,mahak/docker,bearstech/moby,djs55/docker,moby/moby,Ramzec/docker,Ramzec/docker,bearstech/moby,Ramzec/docker,cpuguy83/docker,moul/docker,paralin/docker,flavio/docker,docker/docker,jameszhan/docker,nalind/docker,gnailuy/docker,jimjag/docker,flavio/docker,Mokolea/docker,konstruktoid/docker-upstream,moby/moby,thaJeztah/docker,trebonian/docker,trebonian/docker,gnailuy/docker,flavio/docker,nawawi/docker,jthelin/docker,vdemeester/docker,nawawi/docker,vdemeester/docker,konstruktoid/docker-upstream,docker/docker,trebonian/docker,jimjag/docker,mahak/docker,konstruktoid/docker-upstream,bearstech/moby,nawawi/docker,Mokolea/docker,moby/moby,docker/docker,Mokolea/docker,mahak/docker,jameszhan/docker,thaJeztah/docker,djs55/docker,nalind/docker,paralin/docker,gnailuy/docker,moul/docker,jimjag/docker,vdemeester/docker,flavio/docker,bearstech/moby,jameszhan/docker,AkihiroSuda/docker,cpuguy83/docker,paralin/docker,djs55/docker