notebook.codeActionsOnSave is difficult to use without autocomplete

[Tyriar]

Testing #213608

I have the following set:

{
  "notebook.codeActionsOnSave": {
    "notebook.format.extensionName": "never"
  },
  "notebook.formatOnSave.enabled": true,
}

When using the sample extension at https://github.com/microsoft/vscode-extension-samples/tree/main/notebook-format-code-action-sample I expect this to not trigger the code action on save but it does do it. Because there is no auto-complete I tried a bunch of other things also to no avail.