doc: update sample actions support in mlx5 guide
doc: update sample actions support in mlx5 guide

Updates the documentation for supported sample actions in the NIC Rx
and E-Switch steering flow.

Signed-off-by: Jiawei Wang <059809c318ed50be2148549b4d268f18ba011140@nvidia.com>
Acked-by: Viacheslav Ovsiienko <5b8db9bb93a9a9aefc8828f79604d1fe963a53dd@nvidia.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk