add gov structure link

README.rst

@@ -197,6 +197,7 @@ If you use HNN-core in your work, please cite our
 .. _precompiled installers: https://nrn.readthedocs.io/en/latest/
 .. _NEURON forum: https://www.neuron.yale.edu/phpbb/
 .. _contributing guide: https://jonescompneurolab.github.io/hnn-core/dev/contributing.html
+.. _governance structure: https://jonescompneurolab.github.io/hnn-core/dev/governance.html
 .. _parallel backend guide: https://jonescompneurolab.github.io/hnn-core/dev/parallel.html
 
 .. |tests| image:: https://github.com/jonescompneurolab/hnn-core/actions/workflows/unix_unit_tests.yml/badge.svg?branch=master