ci: update actions versions to avoid Node 16 warnings

[marcospereira]

What

This is to avoid warnings such as in this build run:

https://github.com/casid/jte/actions/runs/8555571353

I've made minor commits to confirm that each update works as expected.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.31%. Comparing base (e8fca09) to head (25d1c29).

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #340   +/-   ##
=========================================
  Coverage     91.31%   91.31%           
  Complexity     1218     1218           
=========================================
  Files            76       76           
  Lines          3168     3168           
  Branches        493      493           
=========================================
  Hits           2893     2893           
  Misses          164      164           
  Partials        111      111           

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[casid]

Thank you for keeping this up-to-date!