doc: fix wording and formatting of mlx5 guide
doc: fix wording and formatting of mlx5 guide

These are simple fixes of punctuation, anchor placement
or wording.
The table format is fixed to avoid having a long line
in the first column.

Fixes: 909be50a34d0 ("doc: update Mellanox guides and release notes")
Cc: stable@dpdk.org

Signed-off-by: Thomas Monjalon <5f50a84c1fa3bcff146405017f36aec1a10a9e38@monjalon.net>
Acked-by: Raslan Darawsheh <18fd192a829ab99382a9c480ddb6085edf3e8489@mellanox.com>

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