emoji install doesn't follow 301 and 302 http statuses

When using an external manifest that has a src = "https://github.com/releases/blah" installation fails.

The pleroma install of the emoji packs won't follow the 302 (or 301's) returned by github when targeting a github release link.

The QueerCats repo has a basic setup for the pleroma emoji installer (https://github.com/ZoeBijl/QueerCats) and at present the url in the index.json won't be valid due to the 302 github returns.