Landmark bug in page layout

[rezrah]

The following AXE violation is occurring on Doctocat sites:

landmark-complementary-is-top-level

This is due to the aside rendering outside of main

[rezrah]

Relevant logs that show the error: https://github.com/github/brand.github.com/actions/runs/16199220335/job/45733698761?pr=112

Preview site containing the error: https://github-adb84a294d-41840202.drafts.github.io/