nginx chart link broken
## Description
Under the section https://docs.gitlab.com/charts/charts/nginx/index.html#configuring-nginx there is one link that sends you to a non-existent file
## Steps to reproduce
Go to url https://docs.gitlab.com/charts/charts/nginx/index.html#configuring-nginx and click "Nginx chart documentation" and get taken to page with error message `"charts/nginx/index.md" did not exist on "master"`
## Actual result
no documentation
## Expected result
documentation (maybe here? https://gitlab.com/gitlab-org/charts/gitlab/-/blob/master/doc/charts/nginx/index.md)
## Further details
Maybe the link is going to the right place but the error is confusing.
issue