fix: fix broken links (#25)

casbin_adapter/adapter.py

@@ -42,7 +42,7 @@ def _create_policy_line(self, ptype, rule):
 
     def save_policy(self, model):
         """saves all policy rules to the storage."""
-        # See https://casbin.org/docs/en/adapters#autosave
+        # See https://casbin.org/docs/adapters/#autosave
         # for why this is deleting all rules
         CasbinRule.objects.using(self.db_alias).all().delete()