Fix typo in the doc

Author: vstinner

Doc/whatsnew/3.14.rst

@@ -1587,7 +1587,7 @@ Limited C API changes
 * Remove the :c:macro:`PySequence_Fast_GET_SIZE`,
   :c:macro:`PySequence_Fast_GET_ITEM` and :c:macro:`PySequence_Fast_ITEMS`
   macros from the limited C API, since these macros never worked in the limited
-  C API. Keep c:func:`PySequence_Fast` in the limited C API.
+  C API. Keep :c:func:`PySequence_Fast` in the limited C API.
   (Contributed by Victor Stinner in :gh:`91417`.)