Fix NEWS: use literal markup for sqlite3_step()

Author: raminfp

Misc/NEWS.d/next/Library/2026-02-20-00-00-00.gh-issue-145040.sqlite3-close-crash.rst

@@ -1,6 +1,6 @@
 Fixed a crash in the :mod:`sqlite3` module caused by closing the database
 connection from within a callback function invoked during
-:func:`sqlite3_step` (e.g., an aggregate ``step``, a user-defined function
+``sqlite3_step()`` (e.g., an aggregate ``step``, a user-defined function
 via :meth:`~sqlite3.Connection.create_function`, a progress handler, or a
 collation callback). Raise :exc:`~sqlite3.ProgrammingError` instead of
 crashing.