404 Errors on Models with External Subsystems doc page

[hschilling]

Description

The Models with External Subsystems doc page

https://openmdao.github.io/Aviary/getting_started/onboarding_ext_subsystem.html

has many Error 404's as shown by

Example

https://openmdao.github.io/Aviary/getting_started/onboarding_ext_subsystem.html

Aviary Version

0.10.0.dev0

Relevant environment information

No response