Link to "archived exercises" in network automation does not work

[gdykeman]

https://ansible.github.io/workshops/exercises/ansible_network/

For "There are additional older exercises that are archived here."

Link goes to:
https://ansible.github.io/workshops/exercises/ansible_network/archive/

@IPvSean

[liquidat]

@IPvSean This still does not fix the issue entirely:
https://github.com/ansible/workshops/blob/devel/exercises/ansible_network/supplemental/README.md
expects the exercises under the directory supplemental/exercise, but they are directly under supplemental/.

Example:

- [Exercise 1.0 - Exploring the lab environment](./exercises/1-0-explore)

The location of the exercise is however:

workshops/exercises/ansible_network/supplemental/1-0-explore/README.md

[IPvSean]

this is fixed, just checked https://ansible.github.io/workshops/exercises/ansible_network/supplemental/