swap timing of stale and closing of issues

Putting issues to status stale after 60 days and closing them after
another 300 causes the following problem: either people need to bump an
issue again and again every 60 days or they will probably forget to bump
them because 300 days is quite long and the issue will get closed
unintendedly.

I swapped both times, so that an issue will go idle after 300 days.
After that one bump will renew the issue for another 300 - a user has 60
days to do so.

.github/workflows/stale.yml

@@ -9,10 +9,10 @@ permissions:
   contents: read
 
 env:
-  BEFORE_ISSUE_STALE: 60
-  BEFORE_ISSUE_CLOSE: 300
-  BEFORE_PR_STALE: 60
-  BEFORE_PR_CLOSE: 300
+  BEFORE_ISSUE_STALE: 300
+  BEFORE_ISSUE_CLOSE: 60
+  BEFORE_PR_STALE: 300
+  BEFORE_PR_CLOSE: 60
 
 jobs:
   stale: