Update dependency Microsoft.NET.Test.Sdk to v16.9.1

Author: renovate-bot

src/UnitTests/UnitTests.csproj

@@ -22,7 +22,7 @@
   <ItemGroup>
     <PackageReference Include="FluentAssertions" Version="5.10.3" />
     <PackageReference Include="JUnitTestLogger" Version="1.1.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.8.3" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.1" />
     <PackageReference Include="Moq" Version="4.16.0" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3" />