Update developers_guide.rst

fix typos

Author: zm711

doc/source/developers_guide.rst

@@ -146,7 +146,7 @@ example can be copied and pasted as-is.
 The documentation is written in `reStructuredText`_, using the `Sphinx`_
 documentation system. Any mention of another Neo module, class, attribute,
 method, or function should be properly marked up so automatic
-links can be generated.  The same goes for quantities or numpy.
+links can be generated.  The same goes for quantities or NumPy.
 
 To build the documentation::
 
@@ -267,4 +267,4 @@ The :doc:`governance` document describes how decisions about the project are tak
 .. _pep8: https://pypi.org/project/pep8/
 .. _flake8: https://pypi.org/project/flake8/
 .. _pyflakes: https://pypi.org/project/pyflakes/
-.. _`maintainers team`: https://github.com/orgs/NeuralEnsemble/teams/neo-maintainers
+.. _`maintainers team`: https://github.com/orgs/NeuralEnsemble/teams/neo-maintainers