Update New badge pattern (#8110)

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### WHY are these changes introduced?

Adds new guidance to the New badge pattern page to address New badges
being added to the primary admin nav

<!--
  Context about the problem that’s being addressed.
-->

### WHAT is this pull request doing?
Adds a few bullet points to the new badge pattern and the navigation
component documentation

**On the New badge pattern page**
<img width="846" alt="Screenshot 2023-01-19 at 5 01 08 PM"
src="https://user-images.githubusercontent.com/4642404/213581845-76f932ab-b73b-4ef1-afd1-308850fb4231.png">

**On the navigation component page**
<img width="811" alt="Screenshot 2023-01-19 at 5 01 47 PM"
src="https://user-images.githubusercontent.com/4642404/213581863-bbc0426a-7eee-4c7c-b6a1-13dde645c39e.png">


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### How to 🎩

🖥 [Local development
instructions](https://github.com/Shopify/polaris/blob/main/README.md#local-development)
🗒 [General tophatting
guidelines](https://github.com/Shopify/polaris/blob/main/documentation/Tophatting.md)
📄 [Changelog
guidelines](https://github.com/Shopify/polaris/blob/main/.github/CONTRIBUTING.md#changelog)

<!--
  Give as much information as needed to experiment with the component
  in the playground.
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<details>
<summary>Copy-paste this code in
<code>playground/Playground.tsx</code>:</summary>

```jsx
import React from 'react';
import {Page} from '../src';

export function Playground() {
  return (
    <Page title="Playground">
      {/* Add the code you want to test in here */}
    </Page>
  );
}
```

</details>

### 🎩 checklist

- [ ] Tested on
[mobile](https://github.com/Shopify/polaris/blob/main/documentation/Tophatting.md#cross-browser-testing)
- [ ] Tested on [multiple
browsers](https://help.shopify.com/en/manual/shopify-admin/supported-browsers)
- [ ] Tested for
[accessibility](https://github.com/Shopify/polaris/blob/main/documentation/Accessibility%20testing.md)
- [ ] Updated the component's `README.md` with documentation changes
- [ ] [Tophatted
documentation](https://github.com/Shopify/polaris/blob/main/documentation/Tophatting%20documentation.md)
changes in the style guide

Author: Yuraima Estevez

.changeset/spotty-frogs-exercise.md

@@ -0,0 +1,5 @@
+---
+'polaris.shopify.com': minor
+---
+
+Added New badge pattern guidance for the primary nav

polaris.shopify.com/content/components/navigation.md

@@ -62,6 +62,7 @@ The navigation component should:
 - Use a major icon for item actions.
 - Use a minor icon for secondary actions.
 - Use the provided navigation section component to group navigation items.
+- Not use the [New badge](/patterns/new-badge) in navigation items.
 
 ---
 

polaris.shopify.com/content/patterns/new-badge.md

@@ -24,8 +24,16 @@ The New badge should be used on features that have all of these 3 characteristic
 - It’s creating new value for merchants (not just an improved way of doing something they are already doing)
 - It’s worth distracting our merchants from their current workflow to inform them about a whole new part of Shopify
 
+Example:
+- To signify an entirely new page in the Settings nav
+
+Note: Using the New badge in the Settings nav to draw attention to a new feature must be reviewed and approved by UX management on a case by case basis.
+
 Consider how the admin would look if it was cluttered with New badges or features of varying importance—overusing the badge creates unnecessary distraction and lessens its impact.
 
+### When not to use the New badge
+- Should never be used in the primary [navigation](/components/navigation) menu of the Shopify admin
+
 ## How long to use the New badge
 
 New badges should have a short lifespan. The badge should disappear: