fix broken links in readme (#7055)

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# Pull Request

## 📖 Description

fixing broken links to match ones in https://fast.design/docs/1.x/introduction#where-should-i-start

## 👩‍💻 Reviewer Notes

click on links and check that they work

## ✅ Checklist

### General

<!--- Review the list and put an x in the boxes that apply. -->

- [ ] I have included a change request file using `$ npm run change`
- [ ] I have added tests for my changes.
- [x] I have tested my changes.
- [ ] I have updated the project documentation to reflect my changes.
- [x] I have read the [CONTRIBUTING](https://github.com/microsoft/fast/blob/master/CONTRIBUTING.md) documentation and followed the [standards](https://github.com/microsoft/fast/blob/master/CODE_OF_CONDUCT.md#our-standards) for this project.

README.md

@@ -51,11 +51,11 @@ We hope you're excited by the possibilities that FAST presents. But, you may be
 * "I just want ready-made components!"
   * [Check out the FluentUI Web Components.](https://docs.microsoft.com/en-us/fluent-ui/web-components/)
 * "I want to build my own components."
-  * [Jump to the fast-element docs.](https://fast.design/docs/fast-element/getting-started)
+  * [Jump to the fast-element docs.](https://fast.design/docs/getting-started/quick-start)
 * "I need to integrate FAST with another framework or build system."
   * [Jump to the integration docs.](https://fast.design/docs/integrations)
 * "I want to look at a quick reference."
-  * [Jump to the Cheat Sheet](https://fast.design/docs/resources/cheat-sheet)
+  * [Jump to the Cheat Sheet](https://fast.design/docs/1.x/resources/cheat-sheet)
 
 ## Roadmap