Update migration name

Author: ericholscher

readthedocs/projects/migrations/0031_increase_webhook_maxsize.py renamed to readthedocs/projects/migrations/0032_increase_webhook_maxsize.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# Generated by Django 1.11.16 on 2018-11-02 14:02
+# Generated by Django 1.11.16 on 2018-11-06 23:12
 from __future__ import unicode_literals
 
 from django.db import migrations, models
@@ -8,7 +8,7 @@
 class Migration(migrations.Migration):
 
     dependencies = [
-        ('projects', '0030_change-max-length-project-slug'),
+        ('projects', '0031_add_modified_date_importedfile'),
     ]
 
     operations = [