Update CHANGELOG for v1.5.3

***NO_CI***

Author: nfbot

CHANGELOG.md

@@ -2,7 +2,15 @@
 
 ## [**Changes available only in 'Preview' NuGet packages:**](https://github.com/nanoframework/nanoFramework.Networking.Sntp/tree/HEAD)
 
-[Full Changelog](https://github.com/nanoframework/nanoFramework.Networking.Sntp/compare/v1.5.3-preview.29...HEAD)
+[Full Changelog](https://github.com/nanoframework/nanoFramework.Networking.Sntp/compare/v1.5.3-preview.33...HEAD)
+
+**Documentation and other chores:**
+
+- Bumps nanoFramework.CoreLibrary from 1.10.3-preview.20 to 1.10.4-preview.4 [\#96](https://github.com/nanoframework/nanoFramework.Networking.Sntp/pull/96)
+
+## [v1.5.3-preview.33](https://github.com/nanoframework/nanoFramework.Networking.Sntp/tree/v1.5.3-preview.33) (2021-05-04)
+
+[Full Changelog](https://github.com/nanoframework/nanoFramework.Networking.Sntp/compare/v1.5.3-preview.29...v1.5.3-preview.33)
 
 **Documentation and other chores:**
 
@@ -443,7 +451,7 @@
 
 ## [v1.0.2-preview-002](https://github.com/nanoframework/nanoFramework.Networking.Sntp/tree/v1.0.2-preview-002) (2018-11-06)
 
-[Full Changelog](https://github.com/nanoframework/nanoFramework.Networking.Sntp/compare/v1.0.2-preview-032...v1.0.2-preview-002)
+[Full Changelog](https://github.com/nanoframework/nanoFramework.Networking.Sntp/compare/v1.0.2-preview-036...v1.0.2-preview-002)
 
 **Implemented enhancements:**
 
@@ -460,17 +468,17 @@
 - Bump nanoFramework.CoreLibrary from 1.0.0-preview062 to 1.0.0-preview073 in /source [\#2](https://github.com/nanoframework/nanoFramework.Networking.Sntp/pull/2)
 - 📦 Update mscorlib Nuget to 1.0.0-preview062 [\#1](https://github.com/nanoframework/nanoFramework.Networking.Sntp/pull/1)
 
+## [v1.0.2-preview-036](https://github.com/nanoframework/nanoFramework.Networking.Sntp/tree/v1.0.2-preview-036) (2018-10-17)
+
+[Full Changelog](https://github.com/nanoframework/nanoFramework.Networking.Sntp/compare/v1.0.2-preview-032...v1.0.2-preview-036)
+
 ## [v1.0.2-preview-032](https://github.com/nanoframework/nanoFramework.Networking.Sntp/tree/v1.0.2-preview-032) (2018-10-17)
 
 [Full Changelog](https://github.com/nanoframework/nanoFramework.Networking.Sntp/compare/v1.0.2-preview-033...v1.0.2-preview-032)
 
 ## [v1.0.2-preview-033](https://github.com/nanoframework/nanoFramework.Networking.Sntp/tree/v1.0.2-preview-033) (2018-10-17)
 
-[Full Changelog](https://github.com/nanoframework/nanoFramework.Networking.Sntp/compare/v1.0.2-preview-036...v1.0.2-preview-033)
-
-## [v1.0.2-preview-036](https://github.com/nanoframework/nanoFramework.Networking.Sntp/tree/v1.0.2-preview-036) (2018-10-17)
-
-[Full Changelog](https://github.com/nanoframework/nanoFramework.Networking.Sntp/compare/v1.0.0...v1.0.2-preview-036)
+[Full Changelog](https://github.com/nanoframework/nanoFramework.Networking.Sntp/compare/v1.0.0...v1.0.2-preview-033)
 
 ## [v1.0.0](https://github.com/nanoframework/nanoFramework.Networking.Sntp/tree/v1.0.0) (2018-10-17)