Add belated migration for SoR rename

Back in September, we renamed MITOC Rock Program back into School of
Rock: 4aab6d9

I forgot to commit a migration changing the `choices` on a new trip's
program. This is thankfully a no-op SQL-wise, so it's really no harm
that it's coming in so late.

ws/migrations/0041_sor_rename.py

@@ -0,0 +1,44 @@
+# Generated by Django 3.2.13 on 2022-05-09 18:13
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('ws', '0040_car_year_and_driving_self'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='trip',
+            name='program',
+            field=models.CharField(
+                choices=[
+                    (
+                        'Specific rating required',
+                        [
+                            ('biking', 'Biking'),
+                            ('boating', 'Boating'),
+                            ('cabin', 'Cabin'),
+                            ('climbing', 'Climbing'),
+                            ('hiking', '3-season hiking'),
+                            ('mitoc_rock_program', 'School of Rock'),
+                            ('winter_school', 'Winter School'),
+                            ('winter_non_iap', 'Winter (outside IAP)'),
+                        ],
+                    ),
+                    (
+                        'Any leader rating allowed',
+                        [
+                            ('circus', 'Circus'),
+                            ('service', 'Service'),
+                            ('none', 'None'),
+                        ],
+                    ),
+                ],
+                default='none',
+                max_length=255,
+            ),
+        ),
+    ]