Fixes #7115: Fix favicon link

[amousset]

https://www.rudder-project.org/redmine/issues/7115

[jooooooon]

Hmmm. I'm confused here @amousset, I don't see what problem this is fixing. Your ticket doesn't explain any symptoms (just a proposed solution), so I can't understand your motivation here.

On http://www.rudder-project.org, this doc is displayed in a sub-directory (/doc), so the favicon used is the one from the above website (and this works for me currently). So I don't see what is broken there. Are you experiencing favicon trouble on other locations for this doc, or other errors?

Either way, please clarify the ticket, to describe the problem (not just the proposed solution), because currently I don't see any reason for this change. It does, however, look technically correct!

[amousset]

Updated description in https://www.rudder-project.org/redmine/issues/7115

[jooooooon]

Thanks, I get it now. I didn't realise the docs pointed to their own favicon.