Update dependency NUnit3TestAdapter to v4.3.1 (#583)

+semver:patch

Author: renovate[bot]

src/FluentNHibernate.Testing/FluentNHibernate.Testing.csproj

@@ -22,7 +22,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.4.0" />
     <PackageReference Include="FakeItEasy" Version="7.3.1" />
     <PackageReference Include="NUnit" Version="3.13.3" />
-    <PackageReference Include="NUnit3TestAdapter" Version="4.3.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.3.1" />
     <PackageReference Include="System.Data.SQLite.Core" Version="1.0.116" />
   </ItemGroup>