Update who-uses.json

Add Arven Tech website.

We are a software factory!

Author: juliokriger

content/discover/who-uses.json

@@ -180,6 +180,7 @@
     "https://devitjobs.com",
     "https://formation.tech",
     "https://gofirmex.com",
-    "https://vbdhub.org"
+    "https://vbdhub.org",
+    "https://www.arven-tech.com",
   ]
 }