Add NEWS entry for itertools.groupby crash fix

VanshAgarwal24036 · VanshAgarwal24036 · commit f12123c11127 · 2026-01-13T08:48:44.000+05:30
diff --git a/Misc/NEWS.d/next/Library/2026-01-13-itertools-groupby-uaf.rst b/Misc/NEWS.d/next/Library/2026-01-13-itertools-groupby-uaf.rst
@@ -0,0 +1,2 @@
+Fix a crash in itertools.groupby that could occur when a user-defined
+__eq__ method re-enters the iterator during key comparison.

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+Fix a crash in itertools.groupby that could occur when a user-defined`
	`2`	`+__eq__ method re-enters the iterator during key comparison.`