feat(apropos): applique le style DSFR à la page À Propos

[codecov-commenter]

Codecov Report

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

Project coverage is 79.07%. Comparing base (0a85612) to head (7f185bf).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1230 +/- ## ========================================== - Coverage 79.08% 79.07% -0.02% ========================================== Files 773 773 Lines 92354 92301 -53 Branches 6116 6118 +2 ========================================== - Hits 73042 72989 -53 Misses 19181 19181 Partials 131 131 ``` | [Flag](https://app.codecov.io/gh/MTES-MCT/camino/pull/1230/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=MTES-MCT) | Coverage Δ | | |---|---|---| | [api](https://app.codecov.io/gh/MTES-MCT/camino/pull/1230/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=MTES-MCT) | `74.26% <ø> (ø)` | | | [api-integration](https://app.codecov.io/gh/MTES-MCT/camino/pull/1230/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=MTES-MCT) | `66.77% <ø> (ø)` | | | [api-unit](https://app.codecov.io/gh/MTES-MCT/camino/pull/1230/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=MTES-MCT) | `36.03% <ø> (ø)` | | | [common](https://app.codecov.io/gh/MTES-MCT/camino/pull/1230/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=MTES-MCT) | `94.68% <ø> (ø)` | | | [ui](https://app.codecov.io/gh/MTES-MCT/camino/pull/1230/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=MTES-MCT) | `75.28% <100.00%> (-0.04%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=MTES-MCT#carryforward-flags-in-the-pull-request-comment) to find out more.

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[github-actions[bot]]

:tada: This PR is included in version 0.91.0 :tada:

The release is available on GitHub release

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