[PATCH 3/5] doc: develop: codingstyle: Update b4 external link

[Quentin Schulz]

Hi Tom,

On 1/20/26 11:31 PM, Tom Rini wrote:
> Rather than pointing at the source code for b4, point the the official
> documentation. Also, use an anonymous reference for the link, per rST
> best practices.
> 

TIL :)

> Signed-off-by: Tom Rini <trini at konsulko.com>

Reviewed-by: Quentin Schulz <quentin.schulz at cherry.de>

Thanks!
Quentin