Silence a warning specific to Python 3.14

Author: mr-c

cheroot/test/test_ssl.py

@@ -320,6 +320,12 @@ def test_ssl_adapters(  # pylint: disable=too-many-positional-arguments
     assert resp.text == 'Hello world!'
 
 
+@pytest.mark.filterwarnings(
+    'ignore:'
+    'Exception ignored while calling deallocator.*OSError.*'
+    ' [Errno 9] Bad file descriptor.*:'
+    'pytest.PytestUnraisableExceptionWarning',
+)
 @pytest.mark.parametrize(  # noqa: C901  # FIXME
     'adapter_type',
     (