Add Réa to list of relay users (#4430)

Summary:
We have been using Relay in our product (web and mobile apps) since the very beginning of our company 5 years ago

Pull Request resolved: #4430

Reviewed By: voideanvalue

Differential Revision: D48988983

Pulled By: captbaritone

fbshipit-source-id: 6e25399ef38bf3369112019a34ec18b0c02113fc

Author: maxaggedon

website/docusaurus.config.js

@@ -192,6 +192,12 @@ module.exports = {
         infoLink: 'https://www.atlassian.com/',
         pinned: false,
       },
+      {
+        caption: 'Réa',
+        image: '/img/logos/rea.png',
+        infoLink: 'https://www.rea-app.fr/',
+        pinned: false,
+      },
     ],
   },
   onBrokenLinks: 'throw',