Loading old docs flashes `Go to v6.7` button before `Go to v7.1` button is rendered

[johanrd]

1. Go to https://guides.emberjs.com/v3.14.0/templates/input-components/

See that the button to the new guides are rendered as Go to v6.7 in a short flash before Go to v7.1 is rendered (Video shows as first load, and reloads with CMD+R):

Screen.Recording.2026-07-27.at.09.56.55.mov