Set page as permanently outdated

Why

When maintaining a site that people rely on, you need to ensure that people can easily see the validity of the information presented to them.

By adding a banner at the top of the page explaining that the page is now outdated and will not be receiving updates, it enables people to know they shouldn't 100% account on the details

Since documentation.breadnet.co.uk#145 this has been enabled

How

On the header of the page

When creating a page on this site, the first few lines are yaml

Include the below

title: Add review date to page
+outdated: true

Formatting the page

Ensure that the date is surrounded with ' otherwise we get an error
Do not use # (h1) or it will break the formatting

Your page should look like the below

---
title: Add review date to page
outdated: true
---

## Why

Example Page

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