Work CI-CD

- Update branch names.
- Update nuspec.
- Update build bages.

***NO_CI***

CODE_OF_CONDUCT.md

@@ -1,3 +1,3 @@
 # Contributor Code of Conduct
 
-Please refer to the contributor Code of Conduct at the Home repository [here](https://github.com/nanoframework/Home/blob/master/CODE_OF_CONDUCT.md.
+Please refer to the contributor Code of Conduct at the Home repository [here](https://github.com/nanoframework/Home/blob/main/CODE_OF_CONDUCT.md.

CONTRIBUTING.md

@@ -1,3 +1,3 @@
 # Contributing to **nanoFramework**
 
-Please refer to the contribution guidelines at the Home repository [here](https://github.com/nanoframework/Home/blob/master/CONTRIBUTING.md).
+Please refer to the contribution guidelines at the Home repository [here](https://github.com/nanoframework/Home/blob/main/CONTRIBUTING.md).

README.md

@@ -10,8 +10,8 @@
 
 | Component | Build Status | NuGet Package |
 |:-|---|---|
-| nanoFramework.System.Collections | [![Build Status](https://dev.azure.com/nanoframework/nanoFramework.System.Collections/_apis/build/status/System.Collections?repoName=nanoframework%2FSystem.Collections&branchName=main)](https://dev.azure.com/nanoframework/nanoFramework.System.Collections/_build/latest?definitionId=54&repoName=nanoframework%2FSystem.Collections&branchName=main) | [![NuGet](https://img.shields.io/nuget/v/nanoFramework.System.Collections.svg?label=NuGet&style=flat&logo=nuge)](https://www.nuget.org/packages/nanoFramework.System.Collections/) |
-| nanoFramework.System.Collections (preview) | [![Build Status](https://dev.azure.com/nanoframework/nanoFramework.System.Collections/_apis/build/status/System.Collections?repoName=nanoframework%2FSystem.Collections&branchName=develop)](https://dev.azure.com/nanoframework/nanoFramework.System.Collections/_build/latest?definitionId=54&repoName=nanoframework%2FSystem.Collections&branchName=develop) | [![NuGet](https://img.shields.io/nuget/vpre/nanoFramework.System.Collections.svg?label=NuGet&style=flat&logo=nuge)](https://www.nuget.org/packages/nanoFramework.System.Collections/) |
+| nanoFramework.System.Collections | [![Build Status](https://dev.azure.com/nanoframework/System.Collections/_apis/build/status/System.Collections?repoName=nanoframework%2FSystem.Collections&branchName=main)](https://dev.azure.com/nanoframework/System.Collections/_build/latest?definitionId=54&repoName=nanoframework%2FSystem.Collections&branchName=main) | [![NuGet](https://img.shields.io/nuget/v/nanoFramework.System.Collections.svg?label=NuGet&style=flat&logo=nuge)](https://www.nuget.org/packages/nanoFramework.System.Collections/) |
+| nanoFramework.System.Collections (preview) | [![Build Status](https://dev.azure.com/nanoframework/System.Collections/_apis/build/status/System.Collections?repoName=nanoframework%2FSystem.Collections&branchName=develop)](https://dev.azure.com/nanoframework/System.Collections/_build/latest?definitionId=54&repoName=nanoframework%2FSystem.Collections&branchName=develop) | [![NuGet](https://img.shields.io/nuget/vpre/nanoFramework.System.Collections.svg?label=NuGet&style=flat&logo=nuge)](https://www.nuget.org/packages/nanoFramework.System.Collections/) |
 
 ## Feedback and documentation
 

nanoFramework.System.Collections.nuspec

@@ -12,13 +12,11 @@
     </releaseNotes>
     <developmentDependency>false</developmentDependency>
     <projectUrl>https://github.com/nanoframework/System.Collections</projectUrl>
-    <iconUrl>https://secure.gravatar.com/avatar/97d0e092247f0716db6d4b47b7d1d1ad</iconUrl>
     <icon>images\nf-logo.png</icon>
     <repository type="git" url="https://github.com/nanoframework/System.Collections" commit="$commit$" />
     <copyright>Copyright (c) .NET Foundation and Contributors</copyright>
     <description>
-      This package includes the .NET System.Collections assembly for nanoFramework C# projects.
-This package requires a target with System.Collections v$nativeVersion$ (checksum $checksum$).</description>
+      This package includes the .NET System.Collections assembly for .NET nanoFramework C# projects.&#10;This package requires a target with System.Collections v$nativeVersion$ (checksum $checksum$).</description>
     <summary>nanoFramework.System.Collections assembly for nanoFramework C# projects</summary>
     <tags>nanoFramework C# csharp netmf netnf System.Collections</tags>
     <dependencies>