Set stale lable to 'stale' and increase operations-per-run in stale.yml #3905
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It turned out that the previous increase in operations-per-run still wasn't enough, so we can increase it again.
Also the last time the action was executed some errors were thrown:
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Setting the lable to stale could be a fix for that.
I'm sorry to have to do another PR, but I can't really test things with the stale action in my own repository.