Fix override value in os.rst

Author: rffontenelle

Doc/library/os.rst

@@ -5555,7 +5555,7 @@ Miscellaneous System Information
 
    .. versionchanged:: 3.13
       If :option:`-X cpu_count <-X>` is given or :envvar:`PYTHON_CPU_COUNT` is set,
-      :func:`cpu_count` returns the overridden value *n*.
+      :func:`cpu_count` returns the override value *n*.
 
 
 .. function:: getloadavg()