Google only hosts the latest version of their Chrome installer for download. They’ve already published a higher version than the download expected by the Fixlet.
For Chrome, you have to send at least one action, very quickly after publication, so you can get the version cached on your server.
I did post a Task at https://bigfix.me/fixlet/details/27003 that always downloads & installs the latest version of Chrome, whichever version is available when you take the Action. This Task does not verify the hash of the downloaded installer, so use with care.