[website] Update Debian downloads info

[André Hentschel]

Am 22.07.2015 um 21:27 schrieb Jeremy Newman:
> Patch looks good. We will also need to update all the other languages and put in a redirect for the /downloads/debian page to the regular downloads page.
> 
> -N
> 
> On 07/22/2015 01:43 PM, Rosanne DiMesio wrote:
>> Updates the Debian links on the Downloads page to point to packages.debian.org and deletes the obsolete WineHQ Debian downloads page.
>>

Jeremy, I think the intention was to link to the wine-development package, you changed the link to stable/wine which is quite old meanwhile...