update news message to match code

Author: rmmancom

Misc/NEWS.d/next/Library/2024-04-30-14-03-09.gh-issue-117151.yt2H8c.rst

@@ -1,5 +1,5 @@
 Increase ``io.DEFAULT_BUFFER_SIZE`` from 8k to 128k and adjust :func:`open` on
 platforms where :meth:`os.fstat` provides a ``st_blksize`` field (such as Linux)
-to use ``max(min(io.DEFAULT_BUFFER_SIZE, 8 MiB), device block size)`` rather
+to use ``max(min(blocksize, 8 MiB), io.DEFAULT_BUFFER_SIZE)`` rather
 than always using the device block size. This should improve I/O performance.
 Patch by Romain Morotti.