[3.14] gh-137232: Fix outdated wording

Doc/howto/free-threading-python.rst

@@ -120,9 +120,8 @@ objects of these types may see increased memory usage.  This is expected to be
 addressed in the 3.14 release.
 
 Additionally, numeric and string literals in the code as well as strings
-returned by :func:`sys.intern` are also immortalized.  This behavior is
-expected to remain in the 3.14 free-threaded build.
-
+returned by :func:`sys.intern` are also immortalized.  This behavior is retained
+in the 3.14 free-threaded build.
 
 Frame objects
 -------------
@@ -150,8 +149,8 @@ compared to the default GIL-enabled build.  In 3.13, this overhead is about
 40% on the `pyperformance <https://pyperformance.readthedocs.io/>`_ suite.
 Programs that spend most of their time in C extensions or I/O will see
 less of an impact.  The largest impact is because the specializing adaptive
-interpreter (:pep:`659`) is disabled in the free-threaded build.  We expect
-to re-enable it in a thread-safe way in the 3.14 release.  This overhead is
+interpreter (:pep:`659`) is disabled in the free-threaded build.  We
+re-enabled it in a thread-safe way in the 3.14 release.  This overhead is
 expected to be reduced in upcoming Python release.   We are aiming for an
 overhead of 10% or less on the pyperformance suite compared to the default
 GIL-enabled build.