docs: update favicon
I created a new and cleaner favicon for mesa3d.org, and it seems like a good idea to use that one for the docs as well.
While we're at it, replace the original PNG with the original SVG asset the ICO-file was generated from.
I created a new and cleaner favicon for mesa3d.org, and it seems like a good idea to use that one for the docs as well.
While we're at it, replace the original PNG with the original SVG asset the ICO-file was generated from.