docs: fix broken links

[marcospereira]

What

I noticed in #364 that the links validation workflow is broken since there are a few dead links. This fixes them.

Broken workflow executions

• https://github.com/casid/jte/actions/runs/11000074376
• https://github.com/casid/jte/actions/runs/10530466975

[codecov[bot]]

Codecov Report

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

Project coverage is 91.33%. Comparing base (56ff48f) to head (0250fd7). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #379 +/- ## ========================================= Coverage 91.33% 91.33% Complexity 1215 1215 ========================================= Files 76 76 Lines 3161 3161 Branches 489 489 ========================================= Hits 2887 2887 Misses 164 164 Partials 110 110 ```

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