fix: 'Metamask' casing on token details page (#29250)

## **Description**

Fixes the casing of 'Metamask' to 'MetaMask' on the token details page.

[![Open in GitHub
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## **Related issues**

Fixes: https://consensyssoftware.atlassian.net/browse/MMASSETS-399

## **Manual testing steps**

1. Click on an erc20 token
2. Verify token lists section uses casing 'MetaMask'

## **Screenshots/Recordings**

<!-- If applicable, add screenshots and/or recordings to visualize the
before and after of your change. -->

### **Before**

<img width="327" alt="Screenshot 2024-12-16 at 1 27 31 PM"
src="https://github.com/user-attachments/assets/5faee32d-21a2-474f-b1a2-bf8eebd03297"
/>

### **After**

<img width="325" alt="Screenshot 2024-12-16 at 1 27 09 PM"
src="https://github.com/user-attachments/assets/d3090007-e72f-4ee6-83c9-8006596c53bf"
/>

## **Pre-merge author checklist**

- [ ] I've followed [MetaMask Contributor
Docs](https://github.com/MetaMask/contributor-docs) and [MetaMask
Extension Coding
Standards](https://github.com/MetaMask/metamask-extension/blob/main/.github/guidelines/CODING_GUIDELINES.md).
- [ ] I've completed the PR template to the best of my ability
- [ ] I’ve included tests if applicable
- [ ] I’ve documented my code using [JSDoc](https://jsdoc.app/) format
if applicable
- [ ] I’ve applied the right labels on the PR (see [labeling
guidelines](https://github.com/MetaMask/metamask-extension/blob/main/.github/guidelines/LABELING_GUIDELINES.md)).
Not required for external contributors.

## **Pre-merge reviewer checklist**

- [ ] I've manually tested the PR (e.g. pull and build branch, run the
app, test code being changed).
- [ ] I confirm that this PR addresses all acceptance criteria described
in the ticket it closes and includes the necessary testing evidence such
as recordings and or screenshots.

ui/pages/asset/components/asset-page.tsx

@@ -75,7 +75,7 @@ export type Asset = (
       /** The number of decimal places to move left when displaying balances */
       decimals: number;
       /** An array of token list sources the asset appears in, e.g. [1inch,Sushiswap]  */
-      aggregators?: [];
+      aggregators?: string[];
     }
 ) & {
   /** The hexadecimal chain id */
@@ -332,7 +332,13 @@ const AssetPage = ({
                           >
                             {t('tokenList')}
                           </Text>
-                          <Text>{asset.aggregators.join(', ')}</Text>
+                          <Text>
+                            {asset.aggregators
+                              .map((agg) =>
+                                agg.replace(/^metamask$/iu, 'MetaMask'),
+                              )
+                              .join(', ')}
+                          </Text>
                         </Box>
                       )}
                     </Box>