Project template VsixProjectWindow uses Community.VisualStudio.Toolkit type not present in nuget package reference

[tonyhallett]

ExtensibilityTemplatePack/src/2022/ProjectTemplates/VsixProjectWindow/ToolWindows/ToolWindow.cs

Line 21 in e9b48a9

internal class Pane : ToolkitToolWindowPane

ExtensibilityTemplatePack/src/2022/ProjectTemplates/VsixProjectWindow/VSIXProject.csproj

Line 105 in e9b48a9

<PackageReference Include="Community.VisualStudio.Toolkit.17" Version="17.0.451" ExcludeAssets="Runtime" />

ToolkitToolWindowPane was added in 17.0.451

Note that the template for 2019 is not using ToolkitToolWindowPane.
It was added in 16.0.451