Xcode extension is now generally available

[rakleed]

Why:

Closes:

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

See https://github.blog/changelog/2025-02-14-code-completion-in-github-copilot-for-xcode-is-now-generally-available/.

Also, it would be nice if you notice https://github.com/github/CopilotForXcode maintainers so they remove Preview labels from README because they don't accept PRs.

Check off the following:

• A subject matter expert (SME) has reviewed the technical accuracy of the content in this PR. In most cases, the author can be the SME. Open source contributions may require an SME review from GitHub staff.
• The changes in this PR meet the docs fundamentals that are required for all content.
• All CI checks are passing and the changes look good in the review environment.

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

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Source	Review	Production	What Changed
copilot/using-github-copilot/copilot-chat/asking-github-copilot-questions-in-your-ide.md	fpt ghec	fpt ghec

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🤖 This comment is automatically generated.

[hubwriter]

@rakleed - Many thanks for spotting this and fixing it.

I've raised an issue in the github/CopilotForXcode repo to ask them to remove "Preview."

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