fix api url with trailing slash

Author: darjeeling

pyconkr/external_apis/pretalx/client.py

@@ -43,7 +43,7 @@ def list_sessions(self, event_name: str, only_confirmed: bool = True) -> dict:
         """세션 목록 조회"""
         query_params = {"limit": 300, "state": "confirmed" if only_confirmed else None}
         filtered_query_params = {k: v for k, v in query_params.items() if v is not None}
-        endpoint = f"api/events/{event_name}/submissions?{urllib.parse.urlencode(filtered_query_params)}"
+        endpoint = f"api/events/{event_name}/submissions/?{urllib.parse.urlencode(filtered_query_params)}"
 
         try:
             result = self._request("GET", endpoint)
@@ -54,7 +54,7 @@ def list_sessions(self, event_name: str, only_confirmed: bool = True) -> dict:
 
     def retrieve_session(self, event_name: str, session_id: int) -> dict:
         """세션 상세 조회"""
-        endpoint = f"api/events/{event_name}/submissions/{session_id}"
+        endpoint = f"api/events/{event_name}/submissions/{session_id}/"
 
         try:
             result = self._request("GET", endpoint)