Update README.md

Author: zandigohar

README.md

@@ -114,6 +114,8 @@ If you use **scRegulate** in your research, please cite:
 
 Mehrdad Zandigohar, Jalees Rehman and Yang Dai (2025). **scRegulate: Single-Cell Regulatory-Embedded Variational Inference of Transcription Factor Activity from Gene Expression**, _Bioinformatics_ (in press).
 
+📄 Read the preprint on bioRxiv: [doi.org/10.1093/bioinformatics/btaf638](https://doi.org/10.1093/bioinformatics/btaf638)
+
 📄 Read the preprint on bioRxiv: [10.1101/2025.04.17.649372](https://doi.org/10.1101/2025.04.17.649372)
 
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