Update README.md

Author: ifenty

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-# ECCO version 4 Python Tutorial
+# ECCO Version 4 Python Tutorial
 
 **Content:**
 
 This repository contains a Python tutorial for using the [ECCO Central Production version 4](https://ecco.jpl.nasa.gov/) ocean and sea-ice state estimate.  Directories within the repository include the ([tutorial documentation](http://ecco-v4-python-tutorial.readthedocs.io/)) and individiual lessons from the tutorial as Juypter notebooks ([model settings ([Tutorials_as_Jupyter_Notebooks/](Tutorials_as_Jupyter_Notebooks/) and [Tutorials_as_Python_Files/](Tutorials_as_Python_Files/)).  
 
-The tutorials were written for ECCO version 4 release 3 but should be applicable to any ECCO v4 solution, and are currently being updated for version 4 release 4. If user support is needed, please contact <[email protected]>.
+As of May, 2023 the tutorials have been udpated for ECCO V4r4.  Tutorials that refer to files from V4r3 are also available.
+
+If user support is needed, please contact <[email protected]>.
 
 [Estimating the Circulation and Climate of the Ocean]: http://ecco.jpl.nasa.gov, http://ecco-group.org/