fix: prevent app from breaking when using unsupported chain

EthValue component could not obtain a valid ETH unit when using an unsupported chain.

Author: hbarcelos

src/shared/EthValue.jsx

@@ -207,7 +207,7 @@ function EthValue({ amount, maxIntDigits, decimals, unit, suffixType, render })
       value={value}
       decimals={decimals}
       render={({ formattedValue }) =>
-        render({ amount, value, formattedValue, suffix: unitInfo.suffix[suffixType] ?? '' })
+        render({ amount, value, formattedValue, suffix: unitInfo?.suffix?.[suffixType] ?? '' })
       }
     />
   );