src/Tools/VSCode/extension/isabelle-language.json

clarified file name;

{
    "brackets": [
        ["(", ")"],
        ["[", "]"],
        ["{", "}"],
        ["<", ">"],
        ["«", "»"],
        ["‹", "›"],
        ["⟨", "⟩"],
        ["⌈", "⌉"],
        ["⌊", "⌋"],
        ["⦇", "⦈"],
        ["⟦", "⟧"],
        ["⦃", "⦄"]
    ]
}