gh-117648: Amend NEWS entry (#117697)

Make the wording more vague; the performance impact varies a lot
depending on platform and input.

diff --git a/Misc/NEWS.d/3.13.0a6.rst b/Misc/NEWS.d/3.13.0a6.rst
index f7e90722d659a88306ab1fc036bb4caf2a299471..52735dba3578b5473404be099054add5211e5758 100644 (file)
--- a/Misc/NEWS.d/3.13.0a6.rst
+++ b/Misc/NEWS.d/3.13.0a6.rst
@@ -4,7 +4,7 @@
 .. release date: 2024-04-09
 .. section: Core and Builtins
 
-Speedup :func:`os.path.join` by up to 6% on Windows.
+Improve performance of :func:`os.path.join`.
 
 ..