Change TransactionWidget fiat decimals to two (#8366)

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## [SDK] Fix: Format TransactionWidget fiat amounts to 2 decimals

## Notes for the reviewer

This PR updates the `formatMoney` function to display fiat amounts with a maximum of 2 decimal places instead of 5. This standardizes currency formatting for improved readability within the TransactionWidget.

## How to test

- Verify fiat amounts in the TransactionWidget (e.g., payment screens, token selection) are displayed with a maximum of 2 decimal places.
- Unit tests passed.

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[Slack Thread](https://thirdwebdev.slack.com/archives/C09DS2CKGP2/p1762414792059159?thread_ts=1762414792.059159&cid=C09DS2CKGP2)

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## PR-Codex overview
This PR focuses on modifying the formatting of token balances in the `formatTokenBalance.ts` file to limit the maximum number of fraction digits displayed.

### Detailed summary
- Changed `maximumFractionDigits` from `5` to `2` in the currency formatting options.

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<!-- This is an auto-generated comment: release notes by coderabbit.ai -->

## Summary by CodeRabbit

* **Bug Fixes**
  * Updated currency formatting to display a maximum of 2 decimal places instead of 5, improving readability and consistency of financial amounts throughout the app while maintaining appropriate minimum precision.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: Yash094

packages/thirdweb/src/react/web/ui/ConnectWallet/screens/formatTokenBalance.ts

@@ -49,7 +49,7 @@ function formatMoney(
   return new Intl.NumberFormat(locale, {
     style: "currency",
     currency: currencyCode,
-    maximumFractionDigits: 5,
+    maximumFractionDigits: 2,
     minimumFractionDigits: 0,
   }).format(value);
 }