docs: updated Azure Region Selection & OpenAI Deployment Location

[UtkarshMishra-Microsoft]

Purpose

Replaced hardcoded region values with dynamic placeholders in deploymentMd to support user-selected deployment regions.

Clarified that AZURE_LOCATION and OpenAI Deployment Location are selected during deployment.

Does this introduce a breaking change?

• Yes
• No

How to Test

• Get the code

git clone [repo-address]
cd [repo-name]
git checkout [branch-name]
npm install

• Test the code

What to Check

Verify that the following are valid

• ...

Other Information