This tests out the github actions system, which is quite weird and undocumented. It says this only works with .NET core by default but also supports "4.5.1" as a version. It also says we aren't in the right github actions beta, so this shouldn't work at all.
Since we don't have any developers with GitHub sponsorships turned on, and we don't currently accept donations, this enables the sponsor button so people can donate money to very poor people.
