[Docs] Update Broken Link (#7319)

CORE-0000

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## PR-Codex overview
This PR focuses on updating the content in the `page.mdx` file related to fees and support for the `Universal Bridge` feature.

### Detailed summary
- Updated the explanation of fees for "Buy With Crypto" to specify fee settings in the project page.
- Revised the link for supported cryptocurrencies to direct to a new URL with a specific service.

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

- **Documentation**
  - Clarified FAQ entry about setting additional fees for swap transactions and provided step-by-step instructions for configuring these fees.
  - Updated the "supported chains" link in the FAQ to use an absolute URL.
  - Removed an unnecessary blank line for improved readability.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: saminacodes

apps/portal/src/app/pay/faqs/page.mdx

@@ -16,7 +16,7 @@ thirdweb does not charge any fees for buy with fiat. Any fees on onramping are b
 </Details>
 
 <Details summary="What are the fees for Buy With Crypto?"> 
-For buying with crypto or swap fees, thirdweb charges a 0.3% protocol fee. Developers may monetize their application by charging additional fees set through the dashboard.
+For buying with crypto or swap fees, thirdweb charges a 0.3% protocol fee. Developers may monetize their application by charging additional fees on swap transactions. To set a fee in your project page, navigate to Universal Bridge > Settings to set this fee. 
 </Details>
 
 <Details summary="What does the term “network fees” refer to?"> 
@@ -33,7 +33,6 @@ health, price, and speed to guarantee the best path every time.
 Yes, Universal Bridge is designed to be agnostic to wallet infrastructure. You can use it with any wallet service. 
 </Details>
 
-
 <Details summary="Does Universal Bridge support Apple Pay or Google Pay?"> 
 Apple Pay and Google Pay are supported through the onramp providers depending on region. Coinbase, Stripe, and Transak currently support Apple Pay. Transak supports Google Pay. [Learn more about the supported onramp providers.](/connect/pay/onramp-providers).
 </Details>
@@ -102,7 +101,7 @@ Users will be required to complete KYC verification for their first purchase usi
 </Details>
 
 <Details summary="What cryptocurrencies does Universal Bridge support?"> 
-Universal Bridge can support any currency on our [supported chains](/connect/pay/supported-chains).
+Universal Bridge can support any currency on our [supported chains](https://thirdweb.com/chainlist?service=pay).
 </Details>
 
 <Details summary="How are cryptocurrency prices set in thirdweb Universal Bridge?">