change correct variable

Author: blink1073

jupyter_server_terminals/test/test_terminal.py

@@ -22,7 +22,7 @@ def terminal_path(tmp_path):
 CULL_INTERVAL = 3
 
 if os.name == 'nt':
-    CULL_INTERVAL = 20
+    CULL_TIMEOUT = 20
 
 
 @pytest.fixture