add ausd (#403)

Author: mariobern

pages/price-feeds/sponsored-feeds.mdx

@@ -85,6 +85,7 @@ The price feeds listed in the table below are currently sponsored in Sui mainnet
 | VSUI/USD  | `57ff7100a282e4af0c91154679c5dae2e5dcacb93fd467ea9cb7e58afdcfde27` |
 | FDUSD/USD | `ccdc1a08923e2e4f4b1e6ea89de6acbc5fe1948e9706f5604b8cb50bc1ed3979` |
 | USDY/USD  | `e393449f6aff8a4b6d3e1165a7c9ebec103685f3b41e60db4277b5b6d10e7326` |
+| AUSD/USD  | `d9912df360b5b7f21a122f15bdd5e27f62ce5e72bd316c291f7c86620e07fb2a` |
 
 ## Aptos