Update expectations_open_source_contributors.md

expectations_open_source_contributors.md

@@ -10,6 +10,7 @@ We wanted to clarify the expectations for those students who cannot get course c
 6. We still expect you to abide by our [Code of Conduct](https://wehi-researchcomputing.github.io/code-of-conduct).
 7. We expect that you will tell us if something is wrong so that we can help appropriately.
 8. We want you to have fun, learn new things, and feel part of a community! Please let us know if you aren't feeling this.
+9. We will provide you with a "Certificate of Contribution" that is a permanent record of your contribution.
 
 ## Comparison to the Student Internship with course credit