Update README.md

Author: magland

README.md

@@ -2,6 +2,10 @@
 [![testing](https://github.com/flatironinstitute/dendro/actions/workflows/tests.yml/badge.svg)](https://github.com/flatironinstitute/dendro/actions/workflows/tests.yml)
 [![codecov](https://codecov.io/gh/flatironinstitute/dendro/graph/badge.svg?token=B2DUYR34RZ)](https://codecov.io/gh/flatironinstitute/dendro)
 
+NOTE: [Here is the more recent version of Dendro](https://github.com/magland/dendro)
+
+# BELOW is OLD/OBSOLETE information
+
 ## Getting started
 
 [View the documentation](https://flatironinstitute.github.io/dendro-docs)