Clarify code review request instructions in VS Code

[PEliet]

Why:

Closes: #44587

What's being changed (if available, include any code snippets, screenshots, or gifs):

This PR updates the VS Code instructions for requesting a code review.

It avoids referring to a specific button label that may no longer match the current UI.

[github-actions]

How to review these changes 👓

Thank you for your contribution. To review these changes, choose one of the following options:

• Spin up a codespace
• Set up a local development environment

A Hubber will need to deploy your changes internally to review.

Table of review links

Note: Please update the URL for your staging server or codespace.

The table shows the files in the content directory that were changed in this pull request. This helps you review your changes on a staging server. Changes to the data directory are not included in this table.

Source	Review	Production	What Changed
copilot/how-tos/use-copilot-agents/request-a-code-review/use-code-review.md	fpt ghec	fpt ghec

Key: fpt: Free, Pro, Team; ghec: GitHub Enterprise Cloud; ghes: GitHub Enterprise Server

🤖 This comment is automatically generated.

[aalmanasir]

@codematrixaditya

[Sharra-writes]

@PEliet In this case, I'm afraid we need to keep the button in, because there are several buttons there. I know I would have been very confused without the specific button listed and shown. We love to make things more general where we can, but this isn't one of those places.