[BUG] line break in nav.yml generation causing doc prettier failure

[reggi]

Is there an existing issue for this?

• I have searched the existing issues

This issue exists in the latest npm version

• I am using the latest npm

Current Behavior

https://github.com/npm/cli/blob/latest/docs/lib/content/nav.yml#L191

this line is breaking prettier in docs

we need to make sure that this doesnt happen here

Expected Behavior

No response

Steps To Reproduce

1. In this environment...
2. With this config...
3. Run '...'
4. See error...

Environment

• npm:
• Node.js:
• OS Name:
• System Model Name:
• npm config:

; copy and paste output from `npm config ls` here