Add missing migration for changed AK notes field help text

AKModel/migrations/0051_ak_notes_help_text.py

+# Generated by Django 3.1.8 on 2022-08-17 17:41
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('AKModel', '0050_message_event_reference'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='ak',
+            name='notes',
+            field=models.TextField(blank=True, help_text='Notes to organizers. These are public. For private notes, please use the button for private messages on the detail page of this AK (after creation/editing).', verbose_name='Organizational Notes'),
+        ),
+        migrations.AlterField(
+            model_name='historicalak',
+            name='notes',
+            field=models.TextField(blank=True, help_text='Notes to organizers. These are public. For private notes, please use the button for private messages on the detail page of this AK (after creation/editing).', verbose_name='Organizational Notes'),
+        ),
+    ]