Issue #26304: Change "allows to <verb>" to "allows <verb>ing" or similar

The original form is incorrect grammar and feels awkward, even though the
meaning is clear.
diff --git a/Doc/c-api/function.rst b/Doc/c-api/function.rst
index ad98322..4c74dc8 100644
--- a/Doc/c-api/function.rst
+++ b/Doc/c-api/function.rst
@@ -40,7 +40,7 @@
 
 .. c:function:: PyObject* PyFunction_NewWithQualName(PyObject *code, PyObject *globals, PyObject *qualname)
 
-   As :c:func:`PyFunction_New`, but also allows to set the function object's
+   As :c:func:`PyFunction_New`, but also allows setting the function object's
    ``__qualname__`` attribute.  *qualname* should be a unicode object or NULL;
    if NULL, the ``__qualname__`` attribute is set to the same value as its
    ``__name__`` attribute.