Fix favicon returning error 404

Description

I've found out that there is an issue with the favicon not loading properly on firefox (didn't test on other browsers) and returning a 404 error as it does not take into account the assetPrefix set in the config file.

To fix that I replaced the href="/favicon.ico" to href="favicon.ico?". I don't know what the "?" does as I did not tested without it, but it works for me. Source: https://stackoverflow.com/a/61073510/12619942

Screenshot

Steps to Verify

I'm using Firefox 104.0.1 (64-bit) on Fedora Linux 36 (Workstation Edition). When opening https://gregrickaby.github.io/nextjs-github-pages/, the favicon isn't shown and after opening the inspection tool the request to the favicon asset returned a 404 error.

Might as well edit your blog post.

No longer an issue with Firefox. Closing.