docs: Update projects.md (#890)

docs/src/getting-started/projects.md

@@ -18,3 +18,4 @@ Open a pull request to add your project to the [list](https://github.com/project
 * [Unk](https://unk.finance/)
 * [Fabric](https://stake.fsynth.io/)
 * [Jet Protocol](https://jetprotocol.io/)
+* [Quarry](https://quarry.so/)