add Fossa logo to sponsors

README.md

@@ -187,6 +187,7 @@ Pull requests are welcome! Please see our [contributing guidelines](https://gith
 
 Does your company use Carbon? Consider sponsoring the project to fund new features, bug fixes, and more.
 
+<a href="https://fossa.com" style="margin-right: 2rem;" target="_blank"><img width="280px" src="https://fossa.com/images/logo.svg" /></a>
 <a href="https://opencollective.com/carbon-app/sponsors/0/website" target="_blank"><img src="https://opencollective.com/carbon-app/sponsors/0/avatar"></a>
 <a href="https://opencollective.com/carbon-app/sponsors/1/website" target="_blank"><img src="https://opencollective.com/carbon-app/sponsors/1/avatar"></a>
 <a href="https://opencollective.com/carbon-app/sponsors/2/website" target="_blank"><img src="https://opencollective.com/carbon-app/sponsors/2/avatar"></a>