[Bug] Update outdated information on Copilot Code Reviews

[chrisreddington]

Summary

Copilot code review recently when Generally Available (as per the GitHub Changelog).

Step 6 of the walkthrough currently refers to "Copilot Review" (assuming this should be corrected to Copilot code review) in a public preview stage. However, it is now generally available.

How to reproduce

N/A - Please see above.

Additional context

N/A