Update Doc/whatsnew/3.14.rst

Co-authored-by: T. Wouters <thomas@python.org>

Author: corona10

Doc/whatsnew/3.14.rst

@@ -69,7 +69,7 @@ Summary -- release highlights
 * :ref:`PEP 761: Discontinuation of PGP signatures <whatsnew314-pep761>`
 * :ref:`A new type of interpreter  <whatsnew314-tail-call>`
 * :ref:`PEP 765: Disallow return/break/continue that exit a finally block <whatsnew314-pep765>`
-* :ref:`Free-threaded CPython <whatsnew314-free-threaded-cpython>`
+* :ref:`Free-threaded mode improvements <whatsnew314-free-threaded-cpython>`
 
 
 Incompatible changes