Update links for repositories moved to the swiftlang org on GitHub

[lamtrinhdev]

Motivation:

Update links for repositories moved to the swiftlang org on GitHub

Modifications:

Update the link:

• https://github.com/apple/swift/ => https://github.com/swiftlang/swift/
• https://github.com/apple/swift-docc/ => https://github.com/swiftlang/swift-docc/
• https://github.com/apple/swift-docker/ => https://github.com/swiftlang/swift-docker/
• https://github.com/apple/swift-book/ => https://github.com/swiftlang/swift-book/
• https://github.com/apple/swift-evolution/ => https://github.com/swiftlang/swift-evolution/

Result:

Correct the links that moved to the new responsible for Swift organization.

Checklist:

• Code and documentation should follow the style of the Style Guide.
• If public symbols are renamed or modified, DocC references should be updated.

[grynspan]

Hi @lamtrinhdev! We appreciate the effort—our team is going to be doing this work when we migrate this repository (soon!) To avoid conflicts, I'm closing this PR. Once our repository has moved, we can clean up any stray links that might still need to be updated.

[lamtrinhdev]

Dear @grynspan ,

Sure. Thank you for your spending time on the PR.

Thanks,
Lam