[Dashboard] Fix contract source code page (#5218)

## Problem solved

Short description of the bug fixed or feature added

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## PR-Codex overview
This PR updates the error handling for resolving the contract ABI in the `page.tsx` file by changing the promise handling from `then` to `catch`, ensuring that any errors in resolving the ABI will result in `undefined` being assigned.

### Detailed summary
- Changed the promise handling for `resolveContractAbi(contract)`:
  - From using `.then(() => undefined)` to `.catch(() => undefined)` to properly handle errors.

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Author: kien-ngo

apps/dashboard/src/app/(dashboard)/(chain)/[chain_id]/[contractAddress]/code/page.tsx

@@ -28,7 +28,7 @@ export default async function Page(props: {
     );
   }
 
-  const abi = await resolveContractAbi(contract).then(() => undefined);
+  const abi = await resolveContractAbi(contract).catch(() => undefined);
 
   return (
     <ContractCodePage