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[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

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

Additional details and impacted files

```diff @@ 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!