resolve backward compatibility issues

Signed-off-by: Beichi-CHs <g841734459@126.com>

utils/models.py

@@ -1,4 +1,4 @@
-from django.contrib.postgres.fields import JSONField  # NOQA
+from django.db.models import JSONField  # NOQA
 from django.db import models
 
 from utils.xss_filter import XSSHtml