DOC: Use community_guidelines ref, leave code_of_conduct alias

Author: effigies

doc/source/devel/core_developer.rst

@@ -146,7 +146,7 @@ As a core member, you should be familiar with community and developer
 resources such as:
 
 -  Our :ref:`chap_devguide`
--  Our :ref:`code_of_conduct`
+-  Our :ref:`community_guidelines`
 -  `PEP8 <https://www.python.org/dev/peps/pep-0008/>`__ for Python style
 -  `PEP257 <https://www.python.org/dev/peps/pep-0257/>`__ and the `NumPy
    documentation

doc/source/devel/governance.rst

@@ -40,7 +40,7 @@ project in concrete ways, such as:
 among other possibilities. By contributing to the project, community members
 can directly help to shape its future.
 
-Contributors should read the :ref:`chap_devguide` and our :ref:`code_of_conduct`.
+Contributors should read the :ref:`chap_devguide` and our :ref:`community_guidelines`.
 
 Core Developers
 ---------------