Update README.md

Author: jcohenadad

README.md

@@ -2,3 +2,8 @@ sct_example_data
 ================
 
 Example data for the Spinal Cord Toolbox (errsm_30).
+
+To release after changes, use [distriploy](https://github.com/neuropoly/distriploy/):
+```bash
+distriploy --revision rYYYYMMDD release
+```