Corrige le tri des congés

[florimondmanca]

• Closes #440

[codecov[bot]]

Codecov Report

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

Project coverage is 91.12%. Comparing base (6d0e5c9) to head (13e8f86).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #441 +/- ## ======================================= Coverage 91.12% 91.12% ======================================= Files 185 185 Lines 2130 2130 Branches 153 153 ======================================= Hits 1941 1941 Misses 182 182 Partials 7 7 ```

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