Bump Umbraco.Cms from 10.1.0 to 10.8.1 in /src/Articulate.Tests.Website

Bumps [Umbraco.Cms](https://github.com/umbraco/Umbraco-CMS) from 10.1.0 to 10.8.1.
- [Release notes](https://github.com/umbraco/Umbraco-CMS/releases)
- [Commits](umbraco/Umbraco-CMS@release-10.1.0...release-10.8.1)

---
updated-dependencies:
- dependency-name: Umbraco.Cms
  dependency-type: direct:production
...

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

src/Articulate.Tests.Website/Articulate.Tests.Website.csproj

@@ -5,7 +5,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Umbraco.Cms" Version="10.1.0" />
+    <PackageReference Include="Umbraco.Cms" Version="10.8.1" />
   </ItemGroup>
 
   <Import Project="..\Articulate\build\Articulate.targets" />