fix typo in monkeypatch title

EvanKepner · EvanKepner · commit 7ff8e1bba7ad · 2019-05-27T11:47:27.000-04:00
diff --git a/doc/en/monkeypatch.rst b/doc/en/monkeypatch.rst
@@ -330,8 +330,8 @@ This behavior can be moved into ``fixture`` structures and shared across tests:
             _ = get_os_user_lower()
 
 
-Monkeypathing dictionaries
---------------------------
+Monkeypatching dictionaries
+---------------------------
 
 :py:meth:`monkeypatch.setitem` can be used to safely set the values of dictionaries
 to specific values during tests. Take this simplified connection string example:
