Workflow badges show "main.yml" but should say tests.

[jaraco]

Taking a look at the projects, there's a variance between the coherent and skeleton projects:

Coherent badges show "main.yml". It would be more descriptive for it to display "tests". Let's figure out why it's different and see if we can't get "tests" in there.

[bswck]

I think it's different because names in the badges are determined from the front-end workflows' name property that defaults to the workflow filename. So... yet another boilerplate to add & maintain :/

[bswck]

It would be pretty cool to somehow smuggle the name from the reusable workflow using a dynamic expression.

[bswck]

I've experimented a little, and it's impossible to have a dynamic name.
run-name won't influence the name displayed in the badge.

We need to populate some boilerplate.