feat: allow LLMs dropdown in academy pages (#2069)

This PR enables the LLM's dropdown on all academy pages.

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> Adds `/academy` to the LLMButtons allowed paths so the dropdown
appears on academy pages.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
5385014. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: birosrichard

apify-docs-theme/src/theme/DocItemContent/index.js

@@ -54,6 +54,7 @@ export default function DocItemContent({ children }) {
     '/platform',
     '/sdk',
     '/cli',
+    '/academy',
   ];
 
   // Define paths that should not show LLMButtons (e.g., changelog pages)