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]

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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.

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/lifecycle stale

[abrennan89]

@carieshmarie I'm not sure it's worth having a single issue tracking this. I doubt anyone will / is able to go through every file and check that they've been redirected, since how would one even know the file had moved unless there's a broken link or something somewhere?

I recommend closing this but lmk what you think 🤷‍♀️

[github-actions]

This issue is stale because it has been open for 90 days with no
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inactivity. Reopen the issue with /reopen.Mark the issue as
fresh by adding the comment /remove-lifecycle stale.