feat: enable sepolia network on prod (#108)

# What ❔

Enable sepolia network on prod.

## Checklist

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packages/app/src/configs/production.config.json

@@ -31,7 +31,7 @@
       "l2WalletUrl": "https://portal.zksync.io/",
       "maintenance": false,
       "name": "sepolia",
-      "published": false,
+      "published": true,
       "rpcUrl": "https://sepolia.era.zksync.dev"
     },
     {