Bump the system group with 1 update

Bumps the system group with 1 update: [System.ServiceModel.Primitives](https://github.com/dotnet/wcf).

- [Release notes](https://github.com/dotnet/wcf/releases)
- [Commits](https://github.com/dotnet/wcf/commits/v6.0.0)

---
updated-dependencies:
- dependency-name: System.ServiceModel.Primitives
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: system
...

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

src/Moq.Tests/Moq.Tests.csproj

@@ -37,7 +37,7 @@
     <PackageReference Include="System.Collections.Specialized" Version="4.3.0" />
     <PackageReference Include="System.ComponentModel.Primitives" Version="4.3.0" />
     <PackageReference Include="System.Diagnostics.TraceSource" Version="4.3.0" />
-    <PackageReference Include="System.ServiceModel.Primitives" Version="4.5.3" />
+    <PackageReference Include="System.ServiceModel.Primitives" Version="6.0.0" />
   </ItemGroup>
 
   <ItemGroup>