Addin Framework parsing fails

### What You Are Seeing?

Error: System.InvalidOperationException: Something went wrong when parsing framework.
### What is Expected?

Script should run withour error
### What version of Cake are you using?

Version 0.16.2+Branch.main.Sha.fb23be463dacfa51c9b19a7cd111149dda7e8c6b
### Are you running on a 32 or 64 bit system?

64-bit
### What environment are you running on? Windows? Linux? Mac?

Windows 7
### Are you running on a CI Server? If so, which one?

No
### How Did You Get This To Happen? (Steps to Reproduce)

Attaching debugger to a script that installs any Cake Addin. I am using VS Code and have tried with Visual Studio too
### Output Log

```
Error: System.InvalidOperationException: Something went wrong when parsing framework.
at Cake.NuGet.V3.NuGetV3ContentResolver.ParseFromDirectoryPath(NuGetFramework current, DirectoryPath path)
at Cake.NuGet.V3.NuGetV3ContentResolver.GetAddinAssemblies(DirectoryPath path)
at Cake.NuGet.NuGetContentResolver.GetFiles(DirectoryPath path, PackageReference package, PackageType type)
at Cake.NuGet.NuGetPackageInstaller.Install(PackageReference package, PackageType type, DirectoryPath path)
at Cake.Core.Scripting.ScriptProcessor.InstallAddins(ScriptAnalyzerResult analyzerResult, DirectoryPath installPath)
at Cake.Core.Scripting.ScriptRunner.Run(IScriptHost host, FilePath scriptPath, IDictionary`2 arguments)
at Cake.Commands.DebugCommand.Execute(CakeOptions options)
at Cake.CakeApplication.Run(CakeOptions options)
at Cake.Program.Main()
```

Start at Cake.NuGet.V3.NuGetV3ContentResolver.ParseFromDirectoryPath, using the reported stack trace to follow the add-in installation path through GetAddinAssemblies and NuGetPackageInstaller.Install. Reproduce by attaching a debugger while running a script that installs a Cake add-in on the reported environment. Done means the script runs without the framework-parsing InvalidOperationException.

Written by the indexing model from the issue text.