The following warnings started to show up in the annotations on each run during

pkgcheck
The set-output command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

Apparently it happens during the "Set up python" phase of "Run pkgcheck" step.

It seems like to be caused by depending on github:actions/setup-python#v2 while it seems already fixed in v4 of that project.

I'd be happy to send a PR to bump the version of the dependency, but I can't judge the full implications of that change, so I decided to open issue for now.