[TOOL-3950] Dashboard: link to /explore page for contracts card on chain page (#6637)

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## PR-Codex overview
This PR updates a link in the `products.ts` file for the dashboard component, changing the URL for a specific product.

### Detailed summary
- Updated the `link` property for the product from `https://thirdweb.com/contracts` to `https://thirdweb.com/explore`.

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Author: MananTank

apps/dashboard/src/app/(dashboard)/(chain)/components/server/products.ts

@@ -14,7 +14,7 @@ export const products = [
     id: "contracts",
     icon: ContractIcon,
     description: "Pre-built contracts & deployment tools",
-    link: "https://thirdweb.com/contracts",
+    link: "https://thirdweb.com/explore",
   },
   {
     name: "Connect SDK",