[Optional] Publish to azure samples browser

This repository is added to [awesome-azd](https://aka.ms/awesome-azd) site and it is a Microsoft-authored template, we encourage you to [publish it to learn.microsoft.com/samples](https://review.learn.microsoft.com/en-us/help/contribute/samples/process/onboarding?branch=main) if you are interested.

cc @greenie-msft, @hemarina

Start with the linked learn.microsoft.com samples onboarding process and check how this repository is represented on the awesome-azd site. Follow the required submission steps for the expense-processor repository; the work is done when it is published in the Microsoft Learn samples browser.

Written by the indexing model from the issue text.