Fix whatsnew for 3.13. (GH-104756)

diff --git a/Doc/whatsnew/3.13 b/Doc/whatsnew/3.13.rst
similarity index 100%
rename from Doc/whatsnew/3.13
rename to Doc/whatsnew/3.13.rst

diff --git a/Doc/whatsnew/index.rst b/Doc/whatsnew/index.rst
index bfee225791eee9454499a64c3d819b34f23e6c01..b9c19602653219cd8a8464eeb47faf33eb699eb0 100644 (file)
--- a/Doc/whatsnew/index.rst
+++ b/Doc/whatsnew/index.rst
@@ -11,6 +11,7 @@ anyone wishing to stay up-to-date after a new release.
 .. toctree::
    :maxdepth: 2
 
+   3.13.rst
    3.12.rst
    3.11.rst
    3.10.rst