Add documentation for experimental warning: C6389 - #3187

Gábor Horváth (@Xazax-hun) : Thanks for your contribution! The author(s) have been notified to review your proposed change.

Gábor Horváth (@Xazax-hun) : Thanks for your contribution! The author(s) have been notified to review your proposed change.

@corob-msft Could you review the new article proposal? We can move the commit to the private repo for merge if you would like to add it. Thanks.

Kristine Toliver (@ktoliver)
Yes, thanks, I'd appreciate a move to cpp-docs-pr to facilitate Acrolinx and preview. I need to make an edit pass, too. It will be easier there.

@corob-msft It's on my to-do list for tomorrow morning. 👍🏻 I'll post here when finished and then close this pull request. Thanks.

The commit is now in a new pull request in the public repo, where it will be merged. The contributor association will be maintained. We'll close this pull request. Thanks.