Add/update articles

Co-authored-by: Stan Ulbrych <stan@python.org>
Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>

Author: hugovk

Doc/whatsnew/3.15.rst

@@ -2030,11 +2030,11 @@ Upgraded experimental JIT compiler
 ----------------------------------
 
 Results from the `pyperformance <https://github.com/python/pyperformance>`__
-benchmark suite report
+benchmark suite report a
 `7-8% <https://www.doesjitgobrrr.com/run/2026-09-25>`__
 geometric mean performance improvement for the JIT over the standard CPython
 interpreter built with all optimizations enabled on x86-64 Linux. On AArch64
-macOS, the JIT has a
+macOS, the JIT has an
 `11-12% <https://www.doesjitgobrrr.com/run/2026-09-25>`__
 speedup over the :ref:`tail calling interpreter <whatsnew314-tail-call-interpreter>`
 with all optimizations enabled. The speedups for JIT