Add a whatsnew entry.

ZeroIntensity · ZeroIntensity · commit 6bddf3322220 · 2025-01-22T09:27:34.000-05:00
diff --git a/Doc/whatsnew/3.14.rst b/Doc/whatsnew/3.14.rst
@@ -1321,6 +1321,9 @@ New features
   bit-packing Python version numbers.
   (Contributed by Petr Viktorin in :gh:`128629`.)
 
+* Add :c:func:`PyUnstable_IsImmortal` for determining whether an object is :term:`immortal`,
+  for debugging purposes.
+
 
 Porting to Python 3.14
 ----------------------
