Don't use :opcode: markup.

Author: nascheme

Misc/NEWS.d/next/Core_and_Builtins/2025-12-24-13-19-16.gh-issue-132657._P4DDb.rst

@@ -1,6 +1,6 @@
-If we are specializing to :opcode:`LOAD_GLOBAL_MODULE` or
-:opcode:`LOAD_ATTR_MODULE`, try to enable deferred reference counting for
-the value, if the object is owned by a different thread.  This applies to
-the free-threaded build only and will improve scaling of multi-threaded
-programs. Note that when deferred reference counting is enabled, the object
-will be deallocated by the GC, rather than by :c:func:`Py_DECREF`.
+If we are specializing to ``LOAD_GLOBAL_MODULE`` or ``LOAD_ATTR_MODULE``, try
+to enable deferred reference counting for the value, if the object is owned by
+a different thread.  This applies to the free-threaded build only and should
+improve scaling of multi-threaded programs. Note that when deferred reference
+counting is enabled, the object will be deallocated by the GC, rather than by
+:c:func:`Py_DECREF`.