docs: adds spectrum css and spectrum web components (#1627)

Author: pfulton

README.md

@@ -94,6 +94,8 @@ To make releasing easier, you can use [this changesets github action](https://gi
 - [Hey API](https://github.com/hey-api/openapi-ts)
 - [neverthrow](https://github.com/supermacro/neverthrow)
 - [Apollo Client](https://github.com/apollographql/apollo-client)
+- [Adobe Spectrum CSS](https://github.com/adobe/spectrum-css)
+- [Adobe Spectrum Web Components](https://github.com/adobe/spectrum-web-components)
 
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