Increase frequency of staleness runs

[andrewpollock]

Run hourly and increase operations per run

This will allow a single pass through all the existing issues to complete, and react to removing the stale label with less latency

https://docs.github.com/en/rest/using-the-rest-api/rate-limits-for-the-rest-api?apiVersion=2022-11-28#primary-rate-limit-for-github_token-in-github-actions

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 65.70%. Comparing base (e0f8777) to head (c9147b9).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1148      +/-   ##
==========================================
- Coverage   65.71%   65.70%   -0.01%     
==========================================
  Files         164      164              
  Lines       13650    13650              
==========================================
- Hits         8970     8969       -1     
- Misses       4196     4197       +1     
  Partials      484      484              

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