py38(django 2.2): bump django-crispy-forms to 1.8.1 (#28344)

requirements-base.txt

@@ -8,7 +8,7 @@ confluent-kafka==1.6.0; python_version == '3.9'
 croniter==0.3.37
 dataclasses==0.8; python_version <= '3.6'
 datadog==0.29.3
-django-crispy-forms==1.7.2
+django-crispy-forms==1.8.1
 django-picklefield==1.0.0
 Django==2.1.15
 djangorestframework==3.11.2