Do not automatically close unfixed tickets (github-actions)

github-actions spams in tickets and closes the tickets just because they were not fixed yet and there is nothing new about it.

https://github.com/fsfe/reuse-tool/issues?q=is%3Aissue%20state%3Aclosed%20label%3Aunresolved

This is very annoying for users investing time to report and also for distributions who rely on a transparent bug reporting culture.
