Update Ruby and Redmine versions in Docker and CI configuration

[haru]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.57%. Comparing base (33ebf12) to head (6ea415c).
⚠️ Report is 6 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop      #44   +/-   ##
========================================
  Coverage    90.57%   90.57%           
========================================
  Files           37       37           
  Lines          881      881           
========================================
  Hits           798      798           
  Misses          83       83           

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