docs: Add SpringBoard to projects.md (#600)

docs/src/getting-started/projects.md

@@ -14,3 +14,4 @@ Open a pull request to add your project to the [list](https://github.com/project
 * [Cyclos](https://cyclos.io/)
 * [Solend](https://solend.fi)
 * [Moët Finance](https://t.co/9eDHRAnGob?amp=1)
+* [SpringBoard](https://springboard.finance/)