There was a link for that in the article.

"Microsoft Notepad can now write for you using generative AI

The new feature is being rolled out to Windows Insiders alongside new AI tools in Paint."

Using AI to "create" things for you isn't the same thing as stealing your work to train said AI (what my original comment was about). I haven't come across anything that suggests Notepad, Paint, or Office does that, but I bet it's a matter of when, not if.