Update dependency Microsoft.NET.Test.Sdk to 18.4.0

Author: renovate[bot]

src/algorithm_exercises_csharp_test/algorithm_exercises_csharp_test.csproj

@@ -37,7 +37,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
     <PackageReference Include="MSTest.TestAdapter" Version="4.1.0" />
     <PackageReference Include="MSTest.TestFramework" Version="4.1.0" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.4" />