Update Updating and release notes

Updating-and-release-notes.md

@@ -43,6 +43,14 @@ dataset if it contains huge dictionaries for a much faster import.
 
 * `3.0.0-beta3`: Fixed bugs in *ngsfilter* when cutting sequences, and a few minor bugs.
 
+### How to update with git:
+
+From the OBITools3 virtual environment, run:
+
+```
+pip3 install --pre --upgrade OBITools3
+```
+
 
 ### How to update with git: