修改settings.json文件中"workbench.editorAssociations"的配置

将原来配置：

"workbench.editorAssociations": {
    "*.ipynb": "jupyter-notebook"
}

改成：

"workbench.editorAssociations": [
        {
            "viewType": "jupyter-notebook",
            "filenamePattern": "*.ipynb"
        }
    ],

或者

"workbench.editorAssociations": { 
            "*.ipynb": "jupyter.notebook.ipynb" 
        }

注意：Mac中settings.json文件路径：~/Library/Application Support/Code/User/settings.json