Merge pull request #3174 from formation-tech/docs-who-uses-formation-tech

docs(who-uses): add formation.tech

Author: kamilmysliwiec

content/discover/who-uses.json

@@ -178,6 +178,7 @@
     "https://cmdn.io",
     "https://ayo.so",
     "https://devitjobs.com",
+    "https://formation.tech",
     "https://gofirmex.com"
   ]
 }