Fix package version and formatting in windowing winforms sample (#134)

Author: angelazhangmsft

Samples/Windowing/cs-winforms-unpackaged/winforms_unpackaged_app.csproj

@@ -1,18 +1,18 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
-	<PropertyGroup>
-		<OutputType>WinExe</OutputType>
-		<TargetFramework>net5.0-windows10.0.19041.0</TargetFramework>
-		<TargetPlatformMinVersion>10.0.17763.0</TargetPlatformMinVersion>
-		<UseWindowsForms>true</UseWindowsForms>
-		<Platforms>x86;x64</Platforms>
-		<RuntimeIdentifiers>win10-x86;win10-x64</RuntimeIdentifiers>
-		<WindowsPackageType>None</WindowsPackageType>
-	</PropertyGroup>
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net5.0-windows10.0.19041.0</TargetFramework>
+    <TargetPlatformMinVersion>10.0.17763.0</TargetPlatformMinVersion>
+    <UseWindowsForms>true</UseWindowsForms>
+    <Platforms>x86;x64</Platforms>
+    <RuntimeIdentifiers>win10-x86;win10-x64</RuntimeIdentifiers>
+    <WindowsPackageType>None</WindowsPackageType>
+  </PropertyGroup>
 
-	<ItemGroup>
-		<PackageReference Include="Microsoft.Windows.SDK.BuildTools" Version="10.0.22499-preview" />
-		<PackageReference Include="Microsoft.WindowsAppSDK" Version="1.0.0" />
-	</ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Microsoft.WindowsAppSDK" Version="1.0.0" />
+    <PackageReference Include="Microsoft.Windows.SDK.BuildTools" Version="10.0.22000.196" />
+  </ItemGroup>
 
 </Project>