[French] Tips for Writing for Web Accessibility

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Original page: https://www.w3.org/WAI/tips/writing/

Main translator: @Soahmed2031

PR opened:

• https://github.com/w3c/wai-quick-start/pull/373

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"Écrire pour l'accessibilité Web" (Writing for Web Accessibility) has been published today: https://www.w3.org/WAI/tips/writing/fr

Thank you @soahmed2031 & Sandra Velarde Gonzalez! 🎉