TagBot setup with registry hook broken

[IanButterworth]

I had set up it such that any new registered version on HolyLabRegistry called back to TagBot on the package repo to create the new tag & release. It requires the repository_dispatch event.

@timholy it seems a bulk TagBot update you did undid that configuration.

I've updated the TagBot.yml setup here to what I think it should be, but it needs e2e testing to be sure.
https://github.com/HolyLab/RegisterDeformation.jl/blob/aa886d30c3f642f16b17a2fac85119fcddc0c8b5/.github/workflows/TagBot.yml

It'd be good to test it before rolling it out further, but I've already cut a new release on that package.

[timholy]

CC @kdw503