How can I use a later version of Markdig than the one that comes with powershell 7.1.3?

Question

The version of Markdig that comes with powershell is really old, so I wanted to use a newer one

I start a new PS Session

[System.AppDomain]::CurrentDomain.GetAssemblies() | Where-Object Location | Sort-Object -Property FullName | Select-Object -Property FullName, Location, GlobalAssemblyCache, IsFullyTrusted | where {$_.FullName -match 'Markdig'}

and I get no results - great, no markdig loaded to the session - so should be no problems with side-by-side loading.

I get the latest version of Markdig.Signed from Nuget and Add-Type

Add-Type -path .\application\Depend-NuGet\Markdig.Signed\lib\netstandard2.0\Markdig.Signed.dll -Verbose

but it totally ignores me and adds the old one from the powershell\7 folder

[System.AppDomain]::CurrentDomain.GetAssemblies() | Where-Object Location | Sort-Object -Property FullName | Select-Object -Property FullName, Location, GlobalAssemblyCache, IsFullyTrusted | where {$_.FullName -match 'Markdig'}

FullName                                                                           Location                                         GlobalAssemblyCache IsFullyTrusted
--------                                                                           --------                                         ------------------- --------------
Markdig.Signed, Version=0.21.1.0, Culture=neutral, PublicKeyToken=870da25a133885f8 C:\Program Files\PowerShell\7\Markdig.Signed.dll               False           True

So annoying. It would be nice if Add-Type could give a warning or something if it was going to totally ignore what it was asked to do.

Is there any way to solve this?