Fix migration order

Signed-off-by: Tushar Goel <tushar.goel.dav@gmail.com>

Author: TG1999

vulnerabilities/migrations/0135_advisoryv2__all_impacts_unfurled_successfully_and_more.py

@@ -18,4 +18,10 @@ class Migration(migrations.Migration):
                 help_text="Indicates whether all impacts for this advisory have been unfurled successfully.",
             ),
         ),
+        migrations.AddIndex(
+            model_name="advisoryv2",
+            index=models.Index(
+                fields=["_all_impacts_unfurled", "id"], name="advisory_unfurled_idx"
+            ),
+        ),
     ]