fix: decrease side padding of token nav buttons (#7452)

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### WHY are these changes introduced?

We have a visual bug in production where the text in the token
navigation breaks in a weird way

<img width="1169" alt="Screenshot 2022-10-19 at 17 48 17"
src="https://user-images.githubusercontent.com/6597467/196741993-cdb4d437-1485-4bf7-ab21-5af213b78843.png">


### WHAT is this pull request doing?

It decreases the side padding of the buttons in the Token's nav bar so
the text does not break in a weird way

<img width="1157" alt="Screenshot 2022-10-19 at 17 48 09"
src="https://user-images.githubusercontent.com/6597467/196742062-e9b92371-c0cd-4565-93b2-16acf0402870.png">


### 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)

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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: Gui Santos

.changeset/great-flowers-protect.md

@@ -0,0 +1,5 @@
+---
+'polaris.shopify.com': patch
+---
+
+fix visual bug in token page's navigation where text was breaking into two lines

polaris.shopify.com/src/components/TokensPage/TokensPage.module.scss

@@ -40,7 +40,7 @@
   }
 
   a {
-    padding: 0.75rem 2rem;
+    padding: 0.75rem 1rem;
     display: block;
     color: var(--text-strong);
     border-right: 1px solid var(--border-color);