Don't use the same favicon as google search

[judfs]

As a developer, being able to identify which tab is google search is very important. Having the google style guide pages open hinders that when the same favicon as search is used. Please change favicon on github hosted style guides.

[vapier]

makes sense. now we just need someone to make a unique icon ;).

[vapier]

hmm, maybe we can point the favicon to the GH avatar

https://avatars.githubusercontent.com/u/1342004

it's kind of like a dark mode G