Fix logging

[jsoref]

Description: The logging is really frustrating.

I created a run that covers 3 items (2 issues and 1 PR): https://github.com/jsoref/stale-bot-debug/actions/runs/5828506506/job/15806335430

• Some of the code understands that humans believe that PRs are not issues and that it's better to call the ambiguous set items, but a lot of the code doesn't.
• The overuse of quotation marks around an error made it look like it was the name of a label.
• Clarify that an item may not yet be marked as stale even though it may be marked as stale moments later.

Related issue: Add link to the related issue.

Check list:

• [ ] Mark if documentation changes are required.
• [ ] Mark if tests were added or updated to cover the changes.

[dsame]

Hello @jsoref for your efforts, we are starting to review the PR