Ensure that all content affected by the nav changes gets a "redirect"

[RichieEscarez]

The following requires a redirect:

• moved or changed folders
• filename change

To add a redirect, you must add the aliases element to the file's frontmatter.

aliases:
- /docs/contribution-guidelines/

Example

---
title: "Knative contribution guidelines"
linkTitle: "Contributing"
weight: 20
type: "docs"
aliases:
  - /docs/contribution-guidelines/
---

[knative-housekeeping-robot]

Issues go stale after 90 days of inactivity.
Mark the issue as fresh by adding the comment /remove-lifecycle stale.
Stale issues rot after an additional 30 days of inactivity and eventually close.
If this issue is safe to close now please do so by adding the comment /close.

Send feedback to Knative Productivity Slack channel or file an issue in knative/test-infra.

/lifecycle stale