Disable NuGet audit in tests

Author: Tyrrrz

PolyShim.Tests/PolyShim.Tests.csproj

@@ -7,6 +7,7 @@
   <PropertyGroup>
     <TargetFrameworks>netcoreapp3.1;net9.0</TargetFrameworks>
     <TargetFrameworks Condition="$([MSBuild]::IsOsPlatform('Windows'))">$(TargetFrameworks);net462</TargetFrameworks>
+    <NuGetAudit>false</NuGetAudit>
   </PropertyGroup>
 
   <PropertyGroup>