Fix typo in `__match_args__` doc (GH-99785)

A opy of GH-98549, whose author (@icecream17) uses a school computer that blocks the CLA site. I did not mention this in commit comment above so CLA bot does not pick up the name and request the CLA again.
(cherry picked from commit a86d8545221b16e714ffe3bda5afafc1d4748d13)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>

diff --git a/Doc/reference/datamodel.rst b/Doc/reference/datamodel.rst
index 2be83d8dd15272aee28172083825d1e70b7bed1f..eafb6ff159981732ec5eb3b2c2bfec3c33ec3158 100644 (file)
--- a/Doc/reference/datamodel.rst
+++ b/Doc/reference/datamodel.rst
@@ -2752,7 +2752,7 @@ Customizing positional arguments in class pattern matching
 
 When using a class name in a pattern, positional arguments in the pattern are not
 allowed by default, i.e. ``case MyClass(x, y)`` is typically invalid without special
-support in ``MyClass``. To be able to use that kind of patterns, the class needs to
+support in ``MyClass``. To be able to use that kind of pattern, the class needs to
 define a *__match_args__* attribute.
 
 .. data:: object.__match_args__