bug with adding a link

[olha-s]

If add a link without https://, then the current domain will be added to the link. For example, if you add a link to www.blocknotejs.org/, then the current domain will appear at the beginning, and it will look like this https://www.blocknotejs.org/www.blocknotejs.org/. If you add from https://, that is, https://www.blocknotejs.org/, then everything works correctly.

The bug can be reproduced here https://www.blocknotejs.org/

I assume that there should be a check for added link and if the link does not contain https://, then only https:// should be added to the link