Update README.md for citation

Author: mvfki

README.md

@@ -19,6 +19,6 @@ We have build a [documentation website](https://pycytosimplex.readthedocs.io/en/
 - [Detailed instruction for installation](https://pycytosimplex.readthedocs.io/en/latest/installation.html)
 - [Walkthrough example from loading data to creating different simplex visualization](https://pycytosimplex.readthedocs.io/en/latest/example/index.html)
 
-If you used CytoSimplex in your work, please cite the following work:
+If you used CytoSimplex in your work, please cite the following work published on *Bioinformatics*:
 
->[Jialin Liu, Yichen Wang, Chen Li, Yichen Gu, Noriaki Ono and Joshua D. Welch, CytoSimplex: Visualizing Single-cell Fates and Transitions on a Simplex, 2023, bioRxiv](https://doi.org/10.1101/2023.12.07.570655)
+>Jialin Liu, Yichen Wang, Chen Li, Yichen Gu, Noriaki Ono and Joshua D. Welch, CytoSimplex: Visualizing Single-cell Fates and Transitions on a Simplex, 2025, *Bioinformatics*, [(https://doi.org/10.1093/bioinformatics/btaf119)](https://doi.org/10.1093/bioinformatics/btaf119)