Upgrades Prettier to 3.6.2 and pins it there. Prettier [recommends pinning the version](https://prettier.io/docs/install#summary):
> Install an exact version of Prettier locally in your project. This makes sure that everyone in the project gets the exact same version of Prettier. Even a patch release of Prettier can result in slightly different formatting, so you wouldn’t want different team members using different versions and formatting each other’s changes back and forth.
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Should probably merge after #85.
Co-authored-by: tobi <kipvandenbos@noreply.codeberg.org>
Reviewed-on: https://codeberg.org/superseriousbusiness/masto-fe-standalone/pulls/86
Co-authored-by: Zoë Bijl <code@moiety.me>
Co-committed-by: Zoë Bijl <code@moiety.me>
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