Reflect spec update

Author: Daraan

peps/pep-0821.rst

@@ -28,8 +28,8 @@ The :ref:`typing specification <typing:callable>` states:
 
   "Parameters specified using Callable are assumed to be positional-only.
   The Callable form provides no way to specify keyword-only parameters,
-  variadic parameters, or default argument values. For these use cases,
-  see the section on Callback protocols."
+  or default argument values. For these use cases, see the section on Callback
+  protocols."
 
 This limitation makes it cumbersome to declare callables meant to be invoked
 with keyword arguments. The existing solution is to define a ``Protocol``::