update fuel mainnet contract address (#458)

Author: cctdaniel

pages/price-feeds/contract-addresses/fuel.mdx

@@ -2,8 +2,9 @@ import CopyAddress from "../../../components/CopyAddress";
 
 # Price Feed Contract Addresses on Fuel
 
-Pyth is currently deployed on Fuel Testnet.
+Pyth is currently deployed on Fuel Mainnet and Fuel Testnet.
 
 | Network      | Contract address                                                                                                                                                                                          |
 | ------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| Fuel Mainnet | <CopyAddress address={`0x1c86fdd9e0e7bc0d2ae1bf6817ef4834ffa7247655701ee1b031b52a24c523da`} url="https://app.fuel.network/contract/0x1c86fdd9e0e7bc0d2ae1bf6817ef4834ffa7247655701ee1b031b52a24c523da" /> |
 | Fuel Testnet | <CopyAddress address={`0x25146735b29d4216639f7f8b1d7b921ff87a1d3051de62d6cceaacabeb33b8e7`} url="https://app.fuel.network/contract/0x25146735b29d4216639f7f8b1d7b921ff87a1d3051de62d6cceaacabeb33b8e7" /> |