Add Grai to non-free (#4092)

non-free.md

@@ -233,6 +233,7 @@
 **[`^        back to top        ^`](##awesome-selfhosted---non-free-software)**
 
 - [Bamboo](https://www.atlassian.com/software/bamboo) - Continuous integration server. `⊘ Proprietary` `Java`
+- [Grai](https://www.grai.io) - Automated integration testing. Uses data lineage to statically analyze the impact of a data change across your entire data stack. ([Source Code](https://www.github.com/grai-io/grai-core)) `Elastic-2.0` `Docker`
 - [Moon](https://aerokube.com/moon/) - Efficient Selenium protocol implementation running everything in Kubernetes or Openshift. `⊘ Proprietary` `Go`
 - [Sentry Self-Hosted](https://github.com/getsentry/self-hosted) - Powerful error tracking platform with wide language support and a robust API. ([Source Code](https://github.com/getsentry/sentry)) `BUSL-1.1` `Python/Django`