chore: update sponsors (#2758)

Author: vue-bot

themes/vue/_config.yml

@@ -125,6 +125,9 @@ silver_sponsors:
   - url: 'https://freebets.us'
     img: free_bets_us.png
     name: Free Bets US
+  - url: 'https://betting.bet'
+    img: betting_bet.png
+    name: betting.bet
 bronze_sponsors:
   - url: 'https://www.accelebrate.com/'
     img: accelebrate.png