I get this warning when seding buffer:

(node:12) ExperimentalWarning: buffer.File is an experimental feature and might change at any time
(Use `node --trace-warnings ...` to show where the warning was created)

Here the code, how can I make it right, not get the Node.js warning?

    const blob = new Blob([xml], { type: 'text/plain' })
    const formData = new FormData()
    formData.append('action-xmlagentxmlfile', blob, 'xmlfile.xml')
    const response = await fetch(`https://www.szamlazz.hu/szamla/`, {
        method: 'POST',
        body: formData,
    })
    const text = await response.text()
    await db.collection('logs').insertOne({
        service: 'prepareAndSendInvoice',
        createdAt: new Date(),
        severity: 'log',
        message: 'Sending invoice response received',
        status: response.status,
        text,
    })
    if (response.status === 200 && !response.headers.has('szlahu_error')) {