Changes proposed in this Pull Request
This promotes the Free Photo Library in the Customer Home with a GIF video demonstrating how to use it and a link to the support document on it: https://en.support.wordpress.com/free-photo-library/
Testing instructions
It should work fine in the Customer Home, although I’m unsure when this should disappear; I feel a GIF could become distracting. I think making it dismissable isn’t a bad idea, but most of the conversation about that seems to be ongoing in #39147.
Fixes #39067
Unfortunately, no screenshots were provided by the developer.
