Merge pull request con2#877 from Meepu/kotae2025-shift-wishes

feat(kotaeexpo2025): update shift wishes survey

Author: japsu

kompassi/events/kotaeexpo2025/forms.py

@@ -227,4 +227,10 @@ def get_instance_for_event_and_person(cls, event, person):
 
     class Meta:
         model = SignupExtra
-        fields = ("shift_wishes",)
+        fields = (
+            "shift_wishes",
+            "accommodation",
+        )
+        widgets = dict(
+            accommodation=forms.CheckboxSelectMultiple,
+        )