Fix typo in COMPAT_MODULES

(Fixing this since I happened to came across it)

celery/five.py

@@ -234,7 +234,7 @@ COMPAT_MODULES = {
         'log': {
             'get_default_logger': 'log.get_default_logger',
             'setup_logger': 'log.setup_logger',
-            'setup_loggig_subsystem': 'log.setup_logging_subsystem',
+            'setup_logging_subsystem': 'log.setup_logging_subsystem',
             'redirect_stdouts_to_logger': 'log.redirect_stdouts_to_logger',
         },
         'messaging': {