apply matti's review comments

Author: ngoldbaum

doc/source/whatsnew.rst

@@ -5,14 +5,15 @@ What's New
 v1.18.0.dev0
 ============
 
-* Added support for free threaded Python. (`XXX`)
+* Added support for free threaded Python. (`#178`_)
   Note that the free-threaded build does not yet support building extensions
   with the limited API, so you must set py_limited_api=False when building
   extensions for the free-threaded build.
 * Added support for Python 3.14. (`#177`_)
 * WIP
 
 .. _`#177`: https://github.com/python-cffi/cffi/pull/177
+.. _`#178`: https://github.com/python-cffi/cffi/pull/178
 
 v1.17.1
 =======