Update README.md

Author: eliotwrobson

README.md

@@ -8,6 +8,7 @@
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
 [![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.10801504.svg)](https://doi.org/10.5281/zenodo.10801504)
 [![SPEC 7 — Seeding pseudo-random number generation](https://img.shields.io/badge/SPEC-7-green?labelColor=%23004811&color=%235CA038)](https://scientific-python.org/specs/spec-0007/)
+[![pyOpenSci Peer-Reviewed](https://pyopensci.org/badges/peer-reviewed.svg)](https://github.com/pyOpenSci/software-review/issues/issue-number)
 
 - **Documentation**: https://eliotwrobson.github.io/CyNetDiff/
 - **Examples**: https://eliotwrobson.github.io/CyNetDiff/examples/preliminaries/