Define only one TargetFramework per platform

Author: t1m0thyj

src/WinDynamicDesktop.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net8.0-windows10.0.19041.0</TargetFramework>
-    <TargetFrameworks Condition="!$([MSBuild]::IsOSPlatform('Windows'))">net8.0</TargetFrameworks>
+    <TargetFramework Condition="$([MSBuild]::IsOSPlatform('Windows'))">net8.0-windows10.0.19041.0</TargetFramework>
+    <TargetFramework Condition="!$([MSBuild]::IsOSPlatform('Windows'))">net8.0</TargetFramework>
     <RuntimeIdentifiers>win-x86;win-x64;win-arm64</RuntimeIdentifiers>
     <Platforms>AnyCPU;x86;x64;ARM64</Platforms>
     <OutputType>WinExe</OutputType>