I would like to contribute with a new favicon for the website

[Muto]

Hello, bug-hurd mailing list readers,

I have created a new favicon.ico, which has a cleaner design and a
smaller filesize than the current one (766 bytes as opposed to 1.1kb).
It does, however, have the same dimensions of 32x32 pixels.

It isn't a huge contribution, but it looks better on browser tabs that
are using a "dark" theme (looks better on the lighter ones, too).

Is there a way I can make a git commit with this to the web.git? Thanks.

Regards, -Muto