fixup typing

src/api/schedule.py

@@ -58,9 +58,9 @@ class Day:
 
     def __init__(self, day, parent: 'Schedule'):
         self.day = day
-        self.rooms = OrderedDict < RoomDay > ()
+        self.rooms: OrderedDict[str, Room] = OrderedDict()
         self.parent = parent
-        self.virtual_rooms = List < PseudoRoom > ()
+        self.virtual_rooms: List[PseudoRoom] = []
 
     def index(self):
         return self.day.index