Documentation: clarify Jenkins access
Documentation: clarify Jenkins access

Signed-off by: Ian Vernon <ian@cilium.io>

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