Replace deprecated workflow with RtD app

[hugovk]

For python/core-workflow#587.

This workflow is deprecated, and uses the pull_request_target target which can be insecure.

Let's test replacing it with the Read the Docs app. If it goes well, we can replace it in the other repos.

@python/organization-owners I've sent a request to install the RtD app for just this repo, please could you enable it?

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📚 Documentation preview 📚: https://cpython-devguide--1713.org.readthedocs.build/

[JacobCoffee]

@hugovk done

[StanFromIreland]

LGTM

[hugovk]

Thanks!

I opened #1714 to test, but it doesn't seem to have triggered.

At least I can see it's installed on this repo:

Will check tomorrow.

[hugovk]

Right, figured it out on my fork: hugovk#37

@Mariatta Please could you add hugovk as a maintainer at https://app.readthedocs.org/dashboard/cpython-devguide/users/ ?

Then I can complete the migration to the app and then check "Show build overview in a comment" at https://app.readthedocs.org/dashboard/cpython-devguide/pull-requests/

[hugovk]

@brettcannon Or please could you do the above to add me? #1713 (comment)

[brettcannon]

@brettcannon Or please could you do the above to add me? #1713 (comment)

Invite sent!

[hugovk]

Thanks, accepted!

I don't see the migration option for this repo, I think it needs someone with admin access to the repo as well. I've added @JacobCoffee to RtD and will talk with him to get it set up.