[Release 1.6.0] Update ChangeLog.md

[felixcho-work]

Changelog for Automation team on behalf of @robplank

[azurecla]

Hi @felixcho-msft, I'm your friendly neighborhood Azure Pull Request Bot (You can call me AZPRBOT). Thanks for your contribution!

This seems like a small (but important) contribution, so no contribution license agreement is required at this point. Real humans will now evaluate your PR.

TTYL, AZPRBOT;