Update sponsored-feeds.mdx (#267)

adding vsui

Author: KemarTiti

pages/price-feeds/sponsored-feeds.mdx

@@ -70,6 +70,7 @@ The price feeds listed in the table below are currently sponsored in Sui mainnet
 | SCA/USD   | `7e17f0ac105abe9214deb9944c30264f5986bf292869c6bd8e8da3ccd92d79bc` |
 | AFSUI/USD | `17cd845b16e874485b2684f8b8d1517d744105dbb904eec30222717f4bc9ee0d` |
 | HASUI/USD | `6120ffcf96395c70aa77e72dcb900bf9d40dccab228efca59a17b90ce423d5e8` |
+| VSUI/USD  | `57ff7100a282e4af0c91154679c5dae2e5dcacb93fd467ea9cb7e58afdcfde27` |
 
 ## Aptos