bump version to beta4

Update dependencies from https://github.com/dotnet/arcade build 20220…

…211.10

Microsoft.DotNet.Arcade.Sdk
 From Version 7.0.0-beta.22103.1 -> To Version 7.0.0-beta.22111.10

Update dependencies from https://github.com/dotnet/arcade build 20210…

…916.4

Microsoft.DotNet.Arcade.Sdk
 From Version 6.0.0-beta.21167.3 -> To Version 7.0.0-beta.21466.4

public != internal

Docs improvements (#979)

* docs updates

* add linux-x64 rid to dotnet-suggest

Update dependencies from https://github.com/dotnet/arcade build 20200…

…401.2

- Microsoft.DotNet.Arcade.Sdk - 5.0.0-beta.20201.2

fix nullability