ci: add check for sp-repo-review on the template output

[henryiii]

We should make sure the generated output passes sp-repo-review (in-development version).

Ahh, since we don't add this, the "check noxfile" check doesn't check repo-review. It think I thought it did. Okay, I'll put that down as something to add.

Originally posted by @henryiii in https://github.com/scientific-python/cookie/issues/720#issuecomment-3627571808