chore: update sponsors (vuejs#2108)

Author: vue-bot

themes/vue/_config.yml

@@ -101,6 +101,9 @@ gold_sponsors:
       https://x-team.com/join/?utm_source=vuejsorg&utm_medium=sponsor&utm_campaign=vuejsorg-patreon
     img: x_team.png
     name: X-Team
+  - url: 'https://www.vpnranks.com/'
+    img: vpnranks.png
+    name: VPNRanks
 silver_sponsors:
   - url: 'https://dopamine.bg/'
     img: dopamine.png