hotfix(eslint-plugin): Fix option schema

[chloe463]

Why

Some plugin's options schema is wrong.

Exected

{
    "wantedly/nexus-camel-case-field-name": [
        "error",
        {
            autofix: true,
        },
    ],
}

Actual

{
    "wantedly/nexus-camel-case-field-name": [
        "error",
        "error",
        {
            autofix: true,
        },
    ],
}

What

Fixed.

cf. https://eslint.org/docs/latest/extend/custom-rules#options-schemas