i18n(fr): update client-side-scripts.mdx

[ArmandPhilippot]

Description (required)

• Add changes from use connectedCallback instead of constructor #9314

Related issues & labels (optional)

• Suggested label: i18n

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Tracked Files

Locale	File	Note
fr	guides/client-side-scripts.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.

[delucis]

Même moi j’arrive à approuver celui-là ! 🚀