Fix favicon link
Fix favicon link

Signed-off-by: Jan-Christoph Borchardt <7f550a9f4c44173a37664d938f1355f0f92a47a7@jancborchardt.net>

opensourcedesign/opensourcedesign.github.io,opensourcedesign/opensourcedesign.github.io,opensourcedesign/opensourcedesign.github.io