i18n(fr): Update guides/integrations-guide/mdx.mdx from #9337

[thomasbnt]

Description (required)

Update guides/integrations-guide/mdx.mdx from #9337

Related issues & labels (optional)

• Suggested label: i18n

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fr	guides/integrations-guide/mdx.mdx	Localization changed, will be marked as complete.

Warnings reference

Icon	Description
🔄️	The source for this localization has been updated since the creation of this pull request, make sure all changes in the source have been applied.

[ArmandPhilippot]

Mostly broken links. Otherwise looks good to me except a wrong translation (matière première) and maybe a difficult sentence to read (I added a suggestion, I don't know if it's better).

[ArmandPhilippot]

A few more changes and I think it will be good!

[ArmandPhilippot]

LGTM! 🚀

[yanthomasdev]

LGTM! Good job 🙌