Missing `upsertKeys` property from `bulkCreate` query interface documentation

Issue Creation Checklist

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Issue Description

When using the updateOnDuplicate option for bulkCreate, this error is raised: TypeError: Cannot read properties of undefined (reading 'map').

The error is not helpful as it doesn't mention what is undefined.

However, it does provide a trace to the line const conflictKeys = options.upsertKeys.map((attr) => this.quoteIdentifier(attr)); in the bulkInsertQuery method.

This trace highlights that upsertKeys is missing from my options. Including it solves the problem.

What was unclear/insufficient/not covered in the documentation

The bulkCreate query interface options documentation points the reader to the documentation for Model.bulkCreate. However, the upsertKeys property is missing from the documentation.

If possible: Provide some suggestion on how we can enhance the docs

Provide documentation foroptions.upsertKeys in Model.bulkCreate.

Additional context

This is for v6 of Sequelize.

Screenshot of missing documentation in Model.bulkCreate as of issue creation time.