Fix typo in CHANGELOG.md

CHANGELOG.md

@@ -2,6 +2,15 @@
 All notable changes to this project will be documented in this file.
 
 ---
+## [5.1.0](https://github.com/ReactiveX/RxSwift/releases/tag/5.1.0)
+
+* Remove UIWebView Reactive Extensions due to [Apple's hard deprecation, starting April 2020](https://developer.apple.com/news/?id=12232019b). #2062
+* Support Mac Catalyst. #2062
+* Add compactMap to SharedSequence, Single and Maybe. #1978
+* Add UITextField.isSecureTextEntry binder. #1968
+* Remove "custom" Result in favor of Foundation.Result. #2006
+* Fix compilation error in SharedSequence.createUnsafe. #2014
+
 ## [5.0.1](https://github.com/ReactiveX/RxSwift/releases/tag/5.0.1)
 
 * Reverts Carthage integration from using static to dynamic libraries. #1960