docs: missing pages

[George-Ogden]

The following pages are linked incorrectly to the documentation (404 errors):

• https://instadeepai.github.io/jumanji/api/environments/robot_warehouse.md
• https://instadeepai.github.io/jumanji/api/environments/multi_cvrp.md

[clement-bonnet]

This seems fixed, right?

• https://instadeepai.github.io/jumanji/environments/robot_warehouse/
• https://instadeepai.github.io/jumanji/environments/multi_cvrp/

[George-Ogden]

Yes