Update README.md (#2614)

Correct the link.

README.md

@@ -6,7 +6,7 @@
 <br />
 <a href="https://cocoapods.org/pods/RxSwift" alt="RxSwift on CocoaPods" title="RxSwift on CocoaPods"><img src="https://img.shields.io/cocoapods/v/RxSwift.svg" /></a>
 <a href="https://github.com/Carthage/Carthage" alt="RxSwift on Carthage" title="RxSwift on Carthage"><img src="https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat" /></a>
-<a href="https://github.com/apple/swift-package-manager" alt="RxSwift on Swift Package Manager" title="RxSwift on Swift Package Manager"><img src="https://img.shields.io/badge/Swift%20Package%20Manager-compatible-brightgreen.svg" /></a>
+<a href="https://github.com/swiftlang/swift-package-manager" alt="RxSwift on Swift Package Manager" title="RxSwift on Swift Package Manager"><img src="https://img.shields.io/badge/Swift%20Package%20Manager-compatible-brightgreen.svg" /></a>
 </p>
 
 Rx is a [generic abstraction of computation](https://youtu.be/looJcaeboBY) expressed through `Observable<Element>` interface, which lets you broadcast and subscribe to values and other events from an `Observable` stream.  
@@ -194,7 +194,7 @@ sed -i -e 's/MACH_O_TYPE = mh_dylib/MACH_O_TYPE = staticlib/g' Carthage/Checkout
 carthage build RxSwift --platform iOS
 ```
 
-### [Swift Package Manager](https://github.com/apple/swift-package-manager)
+### [Swift Package Manager](https://github.com/swiftlang/swift-package-manager)
 
 > **Note**: There is a critical cross-dependency bug affecting many projects including RxSwift in Swift Package Manager. We've [filed a bug (SR-12303)](https://bugs.swift.org/browse/SR-12303) in early 2020 but have no answer yet. Your mileage may vary. A partial workaround can be found [here](https://github.com/ReactiveX/RxSwift/issues/2127#issuecomment-717830502).