Update "Managing Google Chrome" with Fleet article

- @noahtalerman: I assume the below feedback from Google is about this [Fleet article](https://fleetdm.com/guides/managing-chrome-with-fleet):

<img width="682" height="209" alt="Image" src="https://github.com/user-attachments/assets/066fa162-f590-44fd-a087-2287dded33dc" />

- @noahtalerman: Here's the sample XML: https://drive.google.com/file/d/1gbM2jQRSZuK2kl6-aPglmUPNQbhQjQzd/view?usp=sharing