fixup! Provide support for UniqueConstraint.deferrable

src/django_pg_migration_tools/operations.py

@@ -458,7 +458,7 @@ def create_unique_constraint(
         if constraint.deferrable == models.Deferrable.DEFERRED:
             sql += " DEFERRABLE INITIALLY DEFERRED"
         else:
-            # Note that there are only too options for models.Deferrable:
+            # Note that there are only two options for models.Deferrable:
             # IMMEDIATE or DEFERRED. models.Deferrable.IMMEDIATE is the default
             # and most common case. DEFERRED is also Postgres default when no
             # deferrable setting was specified. This means that having an