Updates the versions used in CI. Also fixes the npm-publish workflow. In draft until #2538 is merged, so we can check that the upload to codecov works

Checklist

• PR contains only changes related; no stray files, etc.
• README updated (where applicable)
• Tests written (where applicable)
• References provided in PR (where applicable)

This has more priority since ubuntu-20.04 runners will be removed next week. See the following message that we got on the recent merge to master;
This is a scheduled Ubuntu 20.04 brownout. Ubuntu 20.04 LTS runner will be removed on 2025-04-15. For more details, see https://github.com/actions/runner-images/issues/11101

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.96%. Comparing base (f81d857) to head (8b0bec3).
Report is 37 commits behind head on master.

@@             Coverage Diff             @@
##            master    #2539      +/-   ##
===========================================
- Coverage   100.00%   99.96%   -0.04%     
===========================================
  Files          110      113       +3     
  Lines         2510     2527      +17     
  Branches       633      641       +8     
===========================================
+ Hits          2510     2526      +16     
- Partials         0        1       +1     

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I'll take care of codecov in #2549 as it's unrelated to these changes