[PATCH v1] doc: update release notes for 22.03

[Thomas Monjalon]

16/03/2022 18:33, John McNamara:
> Fix grammar, spelling and formatting of DPDK 22.03 release notes.
> 
> Signed-off-by: John McNamara <john.mcnamara at intel.com>
> ---
> 
> Note: I haven't removed the boilerplate RST comments from
>       this file/patch in order to make it easier to merge
>       apply. If you want me to do that I can submit a v2.

Removed the comments while merging.
Applied, thanks.