Updated homepage asset (#983)

## Description

### Why
Snazzy new asset from design team!

## Screenshots
<img width="950" alt="image"
src="https://github.com/user-attachments/assets/20290d1e-53ba-4a04-acc1-cb0a9e5f4c46">

###### Microsoft Reviewers: [Open in
CodeFlow](https://microsoft.github.io/open-pr/?codeflow=https://github.com/microsoft/react-native-windows-samples/pull/983)

Author: chrisglein