fix ETH price on sepolia network showing 0

[technophile-04]

Description

It seems wagmi chain sepolia has nativeCurrencySymbol as "SEP" instead of "ETH" and we had this guard condition in fetchPriceUniswap :

if (configuredNetwork.nativeCurrency.symbol !== "ETH" && !configuredNetwork.nativeCurrencyTokenAddress) {
    return 0;
  }

Which was returning the price as 0 for Sepolia chain originally encountered here -> scaffold-eth/se-2-challenges#84 (comment)

[technophile-04]

Tysm Rinat for review, Merging this 🙌

[carletex]

If we have to add another symbol in the future, we might want to use an array to store them ["ETH", "SEP", etc] with a good descriptive name + use !includes in the condition.

Thanks for fixing this!