Add Referer header to Homestay requests

room_cal/service_api/_homestay.py

@@ -51,6 +51,7 @@ class _HomestayClient:
       'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:152.0) Gecko/20100101 Firefox/152.0',
       'Accept': 'application/json, text/javascript, */*; q=0.01',
       'Accept-Language': 'en-US,en;q=0.9',
+      'Referer': f'{_BASE}/listing',
       'X-Requested-With': 'XMLHttpRequest',
       'X-CSRF-Token': self._csrf_token,
     }