installing via nuget give .net6.0 error

[JustinWebDev]

I run dotnet tool install --global Cs2Mermaid --version 2.1.0 on my Windows 11 box that has 6.0 SDK installed, and I get this error:

error NU1202: Package Cs2Mermaid 2.1.0 is not compati
ble with net6.0 (.NETCoreApp,Version=v6.0) / any. Package Cs2Mermaid 2.1.0 supports: net9.0 (.NETCoreApp,Version=v9.0)

The nuget page https://www.nuget.org/packages/Cs2Mermaid/ says 6.0 is the minimum SDK version.

Also, if I use the Windows EXE and run it, I do not get an error about .NET versions.