Add 'Leach' project details to README

Added a new section for the 'Leach' project with details.

Author: mikemartinez99

README.md

@@ -104,6 +104,14 @@ The **GDSC** aims to facilitate advanced bioinformatic, computational, and stati
 
 </details>
 
+<details>
+<summary>Leach</summary>
+
+| Project | Modality | Repo | Date |
+|----------|-----------|------|------|
+| leach-260521-bulkATAC | Epigenetics | [GitHub](https://github.com/Dartmouth-Data-Analytics-Core/leach-260521-bulkATAC) | 05/21/2026 |
+
+
 <details>
 <summary>Leib</summary>