CompatHelper: bump compat for JLD2 to 0.5, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the JLD2 package from 0.4 to 0.4, 0.5.
This keeps the compat entries for earlier versions.

Note: I have not tested your package with this new compat entry.
It is your responsibility to make sure that your package tests pass before you merge this pull request.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.6%. Comparing base (36b5b03) to head (daf6a45).
Report is 2 commits behind head on master.

Additional details and impacted files

@@          Coverage Diff           @@
##           master     #77   +/-   ##
======================================
  Coverage    88.6%   88.6%           
======================================
  Files          20      20           
  Lines        1030    1030           
======================================
  Hits          912     912           
  Misses        118     118           

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