Renamed a migration to conform to migration naming conventions, using underscores instead of dashes in the name.

 - Legacy-Id: 17376

Author: levkowetz

…ewersettings-change-reason-text-field.py …ewersettings_change_reason_text_field.pyietf/review/migrations/0023_historicalreviewersettings-change-reason-text-field.py renamed to ietf/review/migrations/0023_historicalreviewersettings_change_reason_text_field.py ietf/review/migrations/0023_historicalreviewersettings-change-reason-text-field.py renamed to ietf/review/migrations/0023_historicalreviewersettings_change_reason_text_field.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# Copyright The IETF Trust 2019, All Rights Reserved
+# Copyright The IETF Trust 2020, All Rights Reserved
 # Generated by Django 1.11.26 on 2019-12-21 11:52
 from __future__ import unicode_literals