[PATCH 2/3] docs: fix links to "contributing" page

[Stephen Finucane]

On Fri, 2017-02-03 at 12:49 +1100, Daniel Axtens wrote:
> Hi Denis,
> 
> Thanks!
> 
> Reviewed-by: Daniel Axtens <dja at axtens.net>

Reviewed-by: Stephen Finucane <stephen at that.guru>

...and applied.