Add link to Guidance breakout session recording at Build

[nking-1]

Purpose

Adds a link to the YouTube video recording of the Guidance breakout session at MS Build 2024.

Does this introduce a breaking change?

When developers merge from main and run the server, azd up, or azd deploy, will this produce an error? If you're not sure, try it out on an old environment.

[ ] Yes
[X] No

Does this require changes to learn.microsoft.com docs?

This repository is referenced by (https://azure.microsoft.com/products/phi-3) which includes deployment, settings and usage instructions.

[ ] Yes
[X] No

Type of change

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[X] Documentation content changes
[ ] Other... Please describe: