API Docs: Use raises field list syntax

See 
https://www.sphinx-doc.org/en/master/usage/restructuredtext/domains.html#info-field-lists

source/blender/python/intern/bpy_rna.c

@@ -8708,11 +8708,8 @@ PyDoc_STRVAR(pyrna_register_class_doc,
              "   If the class has a *register* class method it will be called\n"
              "   before registration.\n"
              "\n"
-             "   .. note::\n"
-             "\n"
-             "      :exc:`ValueError` exception is raised if the class is not a\n"
-             "      subclass of a registerable blender class.\n"
-             "\n");
+             "   :raises ValueError:\n"
+             "      if the class is not a subclass of a registerable blender class.\n");
 PyMethodDef meth_bpy_register_class = {
     "register_class", pyrna_register_class, METH_O, pyrna_register_class_doc};
 static PyObject *pyrna_register_class(PyObject *UNUSED(self), PyObject *py_class)