misc: make ProvisionningMiddle inherit from MiddlewareMixin (#42154)

hobo/agent/authentic2/middleware.py

@@ -1,9 +1,10 @@
 from django.conf import settings
+from django.utils.deprecation import MiddlewareMixin
 
 from .provisionning import provisionning
 
 
-class ProvisionningMiddleware(object):
+class ProvisionningMiddleware(MiddlewareMixin):
     def process_request(self, request):
         provisionning.start()