Docx exporter encounters error due to how it's importing buffer package

[richardvanbergen]

Describe the bug
In the course of normal usage the call to toDocxJsDocument does not work with the following error:

@blocknote_xl-docx-e…r.js?v=258d18af:380 Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'from')
    at async App.tsx:23:26

Seems to be that buffer package removed the named export recently. If change const Buffer = (await import("buffer")).default.Buffer; to const Buffer = (await import("buffer")).default; then it works correctly.

I will create a PR to fix shortly.

To Reproduce

1. https://stackblitz.com/edit/github-7wt3cfcn?file=App.tsx
2. Click the button at the top.