[3.13] Normalize cdecl formatting as found elsewhere on ctypes.rst (GH-121379) (#124056)

Normalize cdecl formatting as found elsewhere on ctypes.rst (GH-121379)
(cherry picked from commit bbb36c0934b7644a9f8b67d3cae78aa6240e005a)

Co-authored-by: utkonos <utkonos@users.noreply.github.com>

Doc/library/ctypes.rst

diff --git a/Doc/library/ctypes.rst b/Doc/library/ctypes.rst
index 94c3071..12b4456 100644
--- a/Doc/library/ctypes.rst
+++ b/Doc/library/ctypes.rst
@@ -51,7 +51,7 @@
 
 
 Here are some examples for Windows. Note that ``msvcrt`` is the MS standard C
-library containing most standard C functions, and uses the cdecl calling
+library containing most standard C functions, and uses the ``cdecl`` calling
 convention::
 
    >>> from ctypes import *