fix: Use http instead of https in URLs

[sethaxen]

This is just to test if this is the problem with datasets failing to download on macos runners

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.61%. Comparing base (1f9f17d) to head (409293e).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #45      +/-   ##
==========================================
+ Coverage   84.31%   84.61%   +0.30%     
==========================================
  Files           5        5              
  Lines          51       52       +1     
==========================================
+ Hits           43       44       +1     
  Misses          8        8              

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