pythongh-121874: Define audit-event open parameters consistently (pythonGH-121883)

Use same names for parameters to avoid triggering a race-condition in Sphinx
that causes non-deterministic output.

Author: bmwiedemann

Doc/library/functions.rst

@@ -1509,7 +1509,7 @@ are always available.  They are listed here in alphabetical order.
    (where :func:`open` is declared), :mod:`os`, :mod:`os.path`, :mod:`tempfile`,
    and :mod:`shutil`.
 
-   .. audit-event:: open file,mode,flags open
+   .. audit-event:: open path,mode,flags open
 
    The ``mode`` and ``flags`` arguments may have been modified or inferred from
    the original call.