minor doc update

Author: rmorshea

docs/source/developer-guide.rst

@@ -360,9 +360,11 @@ already authored :ref:`Changelog summary <Create Changelog Entry>`.
 Other Core Repositories
 -----------------------
 
-IDOM depends on several other core projects. For documentation on them you should refer
-to their respective documentation in the links below:
+IDOM depends on, or is used by several other core projects. For documentation on them
+you should refer to their respective documentation in the links below:
 
+- https://github.com/idom-team/idom-react-component-cookiecutter - A template repo for
+  making :ref:`Custom Javascript Components`.
 - https://github.com/idom-team/flake8-idom-hooks - Enforces the :ref:`Rules of Hooks`
 - https://github.com/idom-team/idom-jupyter - IDOM integration for Jupyter
 - https://github.com/idom-team/idom-dash - IDOM integration for Plotly Dash