Update README.md

Author: sorenhauberg

README.md

@@ -59,7 +59,7 @@ Please observe the Apache 2.0 license that is listed in this repository.
 If you want to cite the framework feel free to use this (but only if you loved it 😊):
 
 ```bibtex
-@article{detlefsen2021stochman,
+@article{software:stochman,
   title={StochMan},
   author={Nicki S. Detlefsen and Dimitrios Kalatzis and Søren Hauberg},
   journal={GitHub. Note: https://github.com/MachineLearningLifeScience/stochman/},