i18n(fr): update guides/routing & some guides/cms

[ArmandPhilippot]

Description (required)

Adds changes from #11501 to the French translation of guides/routing.mdx and updates links in guides/cms/preprcms.mdx and guides/cms/strapi.mdx.

Related issues & labels (optional)

• Suggested label: i18n

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Tracked Files

File	Note
fr/guides/cms/preprcms.mdx	Localization changed, will be marked as complete.
fr/guides/cms/strapi.mdx	Localization changed, will be marked as complete.
fr/guides/routing.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.

[thomasbnt]

LGTM!