fix build failure

nuget pack 5.10.0 requires target platform version to be appended to nuspec

Author: jjw24

Flow.Launcher/Flow.Launcher.csproj

@@ -83,7 +83,7 @@
     <PackageReference Include="InputSimulator" Version="1.0.4" />
     <PackageReference Include="ModernWpfUI" Version="0.9.4" />
     <PackageReference Include="NHotkey.Wpf" Version="2.1.0" />
-    <PackageReference Include="NuGet.CommandLine" Version="5.10.0">
+    <PackageReference Include="NuGet.CommandLine" Version="5.4.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>

Scripts/post_build.ps1

@@ -71,7 +71,7 @@ function Pack-Squirrel-Installer ($path, $version, $output) {
     Write-Host "Packing: $spec"
     Write-Host "Input path:  $input"
     # making version static as multiple versions can exist in the nuget folder and in the case a breaking change is introduced.
-    New-Alias Nuget $env:USERPROFILE\.nuget\packages\NuGet.CommandLine\5.10.0\tools\NuGet.exe -Force
+    New-Alias Nuget $env:USERPROFILE\.nuget\packages\NuGet.CommandLine\5.4.0\tools\NuGet.exe -Force
     # dotnet pack is not used because ran into issues, need to test installation and starting up if to use it.
     nuget pack $spec -Version $version -BasePath $input -OutputDirectory $output -Properties Configuration=Release