Star is very probably correct. Use it and if requested take it down. If you want to be absolutely clear, contact the publisher. They can either give you permission or tell you how to buy a license.
I made a video and used a copyrighted song. To get permission, I contacted the publishing company and they were very happy to sell me a license.
They like money.
I would make that call if I was releasing the newsletter, but since it’s my boss I can’t do that. :-/