[PATCH] doc: update required Mingw version

[Tyler Retzlaff]

On Wed, Apr 03, 2024 at 09:28:51AM -0700, Stephen Hemminger wrote:
> Some new patches were failing on the very old version of mingw that
> is being used by the CI system. But there was no required version
> for mingw listed in the documentation, so add one.
> 
> The version is selected is the version available for Debian oldstable
> (Bullseye) as listed on:
>   https://www.mingw-w64.org/downloads/
> 
> The 10.0 version was released in 4/4/2022,
> The current upstream version 11.0.
> 
> Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
> ---

Acked-by: Tyler Retzlaff <roretzla at linux.microsoft.com>