Bump Microsoft.WindowsAppSDK and WinUIEx

Bumps [Microsoft.WindowsAppSDK](https://github.com/microsoft/windowsappsdk) and [WinUIEx](https://github.com/dotMorten/WinUIEx). These dependencies needed to be updated together.

Updates `Microsoft.WindowsAppSDK` from 1.6.241106002 to 1.6.240829007
- [Release notes](https://github.com/microsoft/windowsappsdk/releases)
- [Commits](https://github.com/microsoft/windowsappsdk/commits)

Updates `WinUIEx` from 2.4.2 to 2.5.0
- [Release notes](https://github.com/dotMorten/WinUIEx/releases)
- [Commits](https://github.com/dotMorten/WinUIEx/commits)

---
updated-dependencies:
- dependency-name: Microsoft.WindowsAppSDK
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: WinUIEx
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

src/SUBSTitute.csproj

@@ -111,7 +111,7 @@
     <PackageReference Include="Microsoft.Xaml.Behaviors.WinUI.Managed" Version="2.0.9" />
     <PackageReference Include="Sungaila.ImmersiveDarkMode.WinUI" Version="1.0.0" />
     <PackageReference Include="System.Drawing.Common" Version="9.0.0" />
-    <PackageReference Include="WinUIEx" Version="2.4.2" />
+    <PackageReference Include="WinUIEx" Version="2.5.0" />
   </ItemGroup>
 
   <ItemGroup>