fixed vulnerability warning for mstest

Author: inforithmics

tests/SQLite.Tests/SQLite.Tests.csproj

@@ -11,7 +11,7 @@
     <PackageReference Include="AltCover" Version="8.7.3" />
     <PackageReference Include="NUnit" Version="3.12.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.16.1" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.8.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.4" />
   </ItemGroup>
 
   <!-- SourceGenerator -->