Fix typing error (#379)

blink1073 · web-flow · commit 943f029accd4 · 2023-09-30T21:21:58.000Z
diff --git a/nbformat/sign.py b/nbformat/sign.py
@@ -585,7 +585,7 @@ def _config_file_name_default(self):
     jupyter trust mynotebook.ipynb and_this_one.ipynb
     """
 
-    flags = trust_flags
+    flags = trust_flags  # type:ignore[assignment]
 
     reset = Bool(
         False,
