🐛 [BUG] - prev and next page on the budgeting categories page point to the same url

[kaichevannes]

Description

The previous and next page both point to the how budgeting works page (https://actualbudget.org/docs/budgeting/)

Reproduction URL

https://actualbudget.org/docs/budgeting/categories/

Reproduction steps

1. Go to https://actualbudget.org/docs/budgeting/categories/
2. Scroll down to the bottom of the page
3. Prev and next pages are the same

Screenshots

![image](https://github.com/user-attachments/assets/66d84782-4352-4c28-915c-5cc151d327bf)

Browsers

Firefox

[kaichevannes]

Sorry, I'm not quite sure how to add the screenshot, it should be obvious if you scroll to the bottom of the page.

[quarklark]

Looks like it may be an issue with the index file for this section:

https://actualbudget.org/docs/budgeting/