Update Algolia indexName to project name

Change the Algolia indexName in docusaurus.config.js from 'mmdocs' to 'MetaMask Documentation' to reflect the project's full name in search configuration. Verify that the corresponding Algolia index exists and that the provided appId/apiKey remain valid after this change.

Author: shahbaz17

docusaurus.config.js

@@ -663,7 +663,7 @@ const config = {
         // The application ID provided by Algolia
         appId: 'W4ZOZ72ZFG',
         apiKey: 'b4e925aa9bf05e5bef2e40b3ee6ee431',
-        indexName: 'mmdocs',
+        indexName: 'MetaMask Documentation',
         contextualSearch: false,
         translations: {
           button: {