Darker github action fails @1.7.1

[mazen-mohamed-tamhub]

Hi,

My Github workflow fails suddenly today with the following message, any ideas?

[MatthijsBurgh]

I also experience this, see https://github.com/MatthijsBurgh/epydoc/actions/runs/4530657654/jobs/7979867795?pr=11

So 639ccb7 is the bad guy here. Which probably worked for you in the same repository, but not outside of it.

I suggest to revert this change. I don't see the benefit of doing a checkout here of the darker repo. Which could even result in permission issues. When people start using different tokens. (I am not sure about it, but it is much more risk involved than reverting this change.)

[akaihola]

Reverted in #486.