docs: missing overflow-y scroll on configuration table of content

[huang-julien]

Environment

https://nitro.unjs.io/config

Reproduction

https://nitro.unjs.io/config

Describe the bug

Hi, i did not verify which component yet but the sidebar on the configuration page is missing a scrollbar (with an auto scroll ?). We need to scroll all the way down manually to the see the endpart of the sidebar (such as hooks, entry, commands ....)

Additional context

Logs

No response