Where is vendored directory in ArgoCD example?

[lesomnus]

One of the requirements (at examples/continuous-delivery/argocd) is:

Follow the vendor generation steps at the root of this repository and generate a vendored folder (referenced in application.yaml).

I can see that vendor directory is created after build.sh example.jsonnet as docs/customizing.md describes.
Where is vendored directory? should I rename vendor to vendored?
Before that, how the k8s resource can reference the direcotry? e.g.

kubectl apply -n argocd application.yaml

Should I fork this repo to create a vendored directory and update the URL of the repo in the application.yaml?