LuaJIT.org stopped publishing release tarballs [1] which caused leafo's GH actions builds [2] to suddenly stop working. The workaround was to start testing against OpenResty's distribution of LuaJIT [3] which is incompatible with LuaJIT.org's version.
There is no faster way to make a fork the de facto standard version than to break everyone's CI builds.
[1] https://luajit.org/download.html
[2] https://github.com/leafo/gh-actions-lua/issues/49
[3] https://github.com/openresty/luajit2