github actions to publish changes to swagger-ui to a bleed branch.

[flowchartsman]

The go generate code has been adapted for the current version of swagger-ui, which more or less amounted to pointing it at a different file, so it should remain stable enough to run against new releases unless they decide to switch something around again. There's no guarantee it will work every time, but for those who want to try it out, it would be better to have some kind of job to do the chore stuff for me and allow people to use newer versions more quickly.