Update README.md

Signed-off-by: Joseph Garrone <joseph.garrone.gj@gmail.com>

Author: garronej

README.md

@@ -115,3 +115,20 @@ Thank you! [Here](https://github.com/codegouvfr/react-dsfr/blob/main/CONTRIBUTIN
 
 This repo was bootstrapped form [garronej/ts-ci](https://github.com/garronej/ts-ci) have a look at the
 documentation of this starter for understanding the lifecycle of this repo.
+
+## Usecase
+
+Projects that uses `@codegouvfr/react-dsfr`:  
+- https://immersion-facile.beta.gouv.fr/  
+
+- https://github.com/DISIC/observatoire.numerique.gouv.fr  
+- https://github.com/DISIC/monfranceconnect  
+- https://github.com/InseeFr/Lunatic-DSFR  
+- https://github.com/EIG6-Geocommuns/lidarviz-front  
+- https://github.com/EIG6-Geocommuns/geocommuns-core  
+- https://github.com/SocialGouv/bpco-site  
+- https://github.com/EIG6-ArtificIA/predictia_front  
+- https://github.com/BaseAdresseNationale/bal-admin  
+- https://github.com/etalab/sill-web  
+- https://github.com/inclusion-numerique/mediature  
+- https://territoiresentransitions.fr (maybe)