docs(contributing): add bind-formula to semantic-release formulas

Author: daks

docs/CONTRIBUTING.rst

@@ -163,6 +163,7 @@ Semantic release formulas
 
 These formulas are already compatible with semantic-release:
 
+* `bind-formula <https://github.com/saltstack-formulas/bind-formula>`_
 * `cert-formula <https://github.com/saltstack-formulas/cert-formula>`_
 * `chrony-formula <https://github.com/saltstack-formulas/chrony-formula>`_
 * `collectd-formula <https://github.com/saltstack-formulas/collectd-formula>`_