docs: Mention LB -> conntrack dependency
docs: Mention LB -> conntrack dependency

LB doesn't work when `--disable-contrack` is passed in. We don't have a
proper documentation section for load-balancing but we now at least
mention it.

Signed-off-by: Ray Bejjani <7f525154e857f3d57a641a83dddc584f42addc6a@covalent.io>

tgraf/cilium,scanf/cilium,tgraf/cilium,eloycoto/cilium,tgraf/cilium,eloycoto/cilium,michi-covalent/cilium,cilium/cilium,cilium/cilium,michi-covalent/cilium,cilium-team/cilium,scanf/cilium,eloycoto/cilium,tklauser/cilium,tklauser/cilium,eloycoto/cilium,michi-covalent/cilium,tgraf/cilium,scanf/cilium,scanf/cilium,tklauser/cilium,eloycoto/cilium,cilium-team/cilium,scanf/cilium,eloycoto/cilium,tgraf/cilium,michi-covalent/cilium,scanf/cilium,tklauser/cilium,eloycoto/cilium,scanf/cilium,cilium/cilium,michi-covalent/cilium,cilium/cilium,tklauser/cilium,tgraf/cilium,cilium/cilium