Fix name of absence_reasons-resolve-method

This broke permission-checking.

aleksis/apps/kolego/schema/__init__.py

@@ -66,7 +66,7 @@ class Query(graphene.ObjectType):
         )
 
     @staticmethod
-    def resolve_absencereasons(root, info, **kwargs) -> QuerySet:
+    def resolve_absence_reasons(root, info, **kwargs) -> QuerySet:
         if not info.context.user.has_perm("kolego.fetch_absencereasons_rule"):
             return []
         return graphene_django_optimizer.query(