add paper link to the changelog
@@ -17,6 +17,8 @@ This project adheres to
- This is the version of PyMedPhys reviewed for PyMedPhys' first publication
within the [Journal of Open Source Software (JOSS)](https://joss.theoj.org/).
+ - Paper available for download at
+ [10.21105/joss.04555](https://doi.org/10.21105/joss.04555)
### Bug Fixes
