Bump CommunityToolkit.Maui.Markup from 3.3.1 to 4.0.0 in /src

Bumps [CommunityToolkit.Maui.Markup](https://github.com/communitytoolkit/Maui.Markup) from 3.3.1 to 4.0.0.
- [Release notes](https://github.com/communitytoolkit/Maui.Markup/releases)
- [Commits](CommunityToolkit/Maui.Markup@3.3.1...4.0.0)

---
updated-dependencies:
- dependency-name: CommunityToolkit.Maui.Markup
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

src/MauiConverter/MauiConverter.csproj

@@ -54,7 +54,7 @@
 
 	<ItemGroup>
     <PackageReference Include="Microsoft.Maui.Controls" Version="$(MauiVersion)" />
-	  <PackageReference Include="CommunityToolkit.Maui.Markup" Version="3.3.1" />
+	  <PackageReference Include="CommunityToolkit.Maui.Markup" Version="4.0.0" />
 	  <PackageReference Include="CommunityToolkit.Mvvm" Version="8.2.2" />
 	  <PackageReference Include="CommunityToolkit.Maui" Version="6.1.0" />
 	</ItemGroup>