fixed and expanded on trigram search

cookbook/migrations/0156_searchpreference_trigram_threshold.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.2.7 on 2021-09-28 16:45
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('cookbook', '0155_mealtype_default'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='searchpreference',
+            name='trigram_threshold',
+            field=models.DecimalField(decimal_places=2, default=0.1, max_digits=3),
+        ),
+    ]