Update CHANGELOG for v1.6.1.3

***NO_CI***

Author: nfbot

CHANGELOG.md

@@ -1,8 +1,8 @@
 # Changelog
 
-## [v1.6.1-preview.2](https://github.com/nanoframework/lib-nanoFramework.System.Net/tree/v1.6.1-preview.2) (2020-06-16)
+## [v1.6.1-preview.4](https://github.com/nanoframework/lib-nanoFramework.System.Net/tree/v1.6.1-preview.4) (2020-06-16)
 
-[Full Changelog](https://github.com/nanoframework/lib-nanoFramework.System.Net/compare/v1.6.0...HEAD)
+[Full Changelog](https://github.com/nanoframework/lib-nanoFramework.System.Net/compare/v1.6.0...v1.6.1-preview.4)
 
 **Documentation and other chores:**
 
@@ -304,7 +304,6 @@
 
 **Documentation and other chores:**
 
-- Update 2 NuGet dependencies [\#86](https://github.com/nanoframework/lib-nanoFramework.System.Net/pull/86)
 - Work on native assembly declaration [\#84](https://github.com/nanoframework/lib-nanoFramework.System.Net/pull/84)
 
 ## [v1.1.1-preview.12](https://github.com/nanoframework/lib-nanoFramework.System.Net/tree/v1.1.1-preview.12) (2019-06-20)
@@ -329,6 +328,7 @@
 
 **Documentation and other chores:**
 
+- Update 2 NuGet dependencies [\#86](https://github.com/nanoframework/lib-nanoFramework.System.Net/pull/86)
 - Update 2 NuGet dependencies [\#81](https://github.com/nanoframework/lib-nanoFramework.System.Net/pull/81)
 
 ## [v1.1.1-preview.1](https://github.com/nanoframework/lib-nanoFramework.System.Net/tree/v1.1.1-preview.1) (2019-06-05)
@@ -471,16 +471,13 @@
 
 **Implemented enhancements:**
 
+- Rework SslStream API [\#53](https://github.com/nanoframework/lib-nanoFramework.System.Net/pull/53)
 - Fix X509Certificate constructors from string [\#52](https://github.com/nanoframework/lib-nanoFramework.System.Net/pull/52)
 
 ## [v1.0.2-preview-023](https://github.com/nanoframework/lib-nanoFramework.System.Net/tree/v1.0.2-preview-023) (2018-12-03)
 
 [Full Changelog](https://github.com/nanoframework/lib-nanoFramework.System.Net/compare/v1.0.2-preview-021...v1.0.2-preview-023)
 
-**Implemented enhancements:**
-
-- Rework SslStream API [\#53](https://github.com/nanoframework/lib-nanoFramework.System.Net/pull/53)
-
 **Documentation and other chores:**
 
 - Bumps nanoFramework.Runtime.Events from 1.0.2-preview-021 to 1.0.2-preview-023 [\#50](https://github.com/nanoframework/lib-nanoFramework.System.Net/pull/50)