Bump CommunityToolkit.Maui from 5.3.0 to 6.0.0 in /samples (#246)

Bumps [CommunityToolkit.Maui](https://github.com/CommunityToolkit/Maui) from 5.3.0 to 6.0.0.
- [Release notes](https://github.com/CommunityToolkit/Maui/releases)
- [Commits](CommunityToolkit/Maui@5.3.0...6.0.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

samples/CommunityToolkit.Maui.Markup.Sample/CommunityToolkit.Maui.Markup.Sample.csproj

@@ -42,7 +42,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="CommunityToolkit.Maui" Version="5.3.0" />
+    <PackageReference Include="CommunityToolkit.Maui" Version="6.0.0" />
     <PackageReference Include="CommunityToolkit.Mvvm" Version="8.2.1" />
     <PackageReference Include="Microsoft.Extensions.Http.Polly" Version="7.0.11" />
     <PackageReference Include="Refit.HttpClientFactory" Version="7.0.0" />

src/CommunityToolkit.Maui.Markup.UnitTests/CommunityToolkit.Maui.Markup.UnitTests.csproj

@@ -14,7 +14,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
     <PackageReference Include="coverlet.collector" Version="6.0.0" PrivateAssets="all" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
-    <PackageReference Include="CommunityToolkit.Maui" Version="5.3.0" />
+    <PackageReference Include="CommunityToolkit.Maui" Version="6.0.0" />
   </ItemGroup>
 
   <ItemGroup>