New translations common.json (Afrikaans)

public/locales/af/common.json

@@ -48,7 +48,7 @@
     },
     "unifi": {
         "users": "Gebruikers",
-        "uptime": "Stelsel Bedryfstyd",
+        "uptime": "Optyd",
         "days": "Daë",
         "wan": "WAN",
         "lan": "LAN",