Updated Swift reference links (#7498)

* Updated Swift reference links

* The Swift Programming Language is now set to the official Swift language guide
* Using Swift with Cocoa and Objective-C is no longer being updated. Most of the content is now available in the _Language Interoperability_ section of the Apple Swift documentation

* Sublist iBooks resources

* Update books/free-programming-books-langs.md

Co-authored-by: David Ordás <3125580+davorpa@users.noreply.github.com>

Co-authored-by: David Ordás <3125580+davorpa@users.noreply.github.com>
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Julius Lundang 2022-10-17 09:01:02 +08:00 committed by GitHub
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@ -2402,8 +2402,9 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
* [Hacking with Swift](https://www.hackingwithswift.com)
* [Swift Handbook](https://thevalleyofcode.com/swift/) - Flavio Copes (HTML, PDF)
* [Swift Notes for Professionals](https://goalkicker.com/SwiftBook/) - Compiled from StackOverflow Documentation (PDF)
* [The Swift Programming Language](https://developer.apple.com/library/prerelease/ios/documentation/Swift/Conceptual/Swift_Programming_Language/index.html) (HTML) [(iBook)](https://itunes.apple.com/us/book/swift-programming-language/id881256329?mt=11)
* [Using Swift with Cocoa and Objective-C](https://developer.apple.com/library/content//documentation/Swift/Conceptual/BuildingCocoaApps/index.html) (HTML) [(iBook)](https://itunes.apple.com/us/book/using-swift-cocoa-objective/id888894773?mt=11)
* [The Swift Programming Language](https://docs.swift.org/swift-book/LanguageGuide/TheBasics.html) (HTML)
* [The Swift Programming Language (Swift 5.7)](https://itunes.apple.com/us/book/swift-programming-language/id881256329?mt=11) - Apple Inc. (iBook)
* [Using Swift with Cocoa and Objective-C](https://itunes.apple.com/us/book/using-swift-cocoa-objective/id888894773?mt=11) - Apple Inc. (iBook)
#### Vapor