[docs]: Arrow key and Scroll Behavior on Module Reference

# Documentation request

[Current Behavior]
Down/up arrows can be used to scroll down the page. Once you click a specific tab, (Summary/Config Schema) arrow keys swap to only switching between the tabs (including up/down).

[Desired Behavior]
Ideally we'd like to see up/down always handle page scroll, and left/right handle tab swapping on the mods if possible.

---
*Reported from: https://cloudinit.readthedocs.io/en/latest/reference/modules.html*