docs: update the version specific notes table
docs: update the version specific notes table

Updates the table in the "Version Specific Notes" subsection of the
"Upgrade" page in order to be explicit about the supported upgrade
paths.

Signed-off-by: Bruno Miguel Custódio <69381c3e8d814a4004d0c4f997287589bd37cfde@gmail.com>

michi-covalent/cilium,cilium/cilium,tklauser/cilium,cilium/cilium,cilium/cilium,michi-covalent/cilium,tklauser/cilium,michi-covalent/cilium,cilium/cilium,michi-covalent/cilium,cilium/cilium,tklauser/cilium,tklauser/cilium,michi-covalent/cilium,tklauser/cilium