chore(deps): update dependency linqkit to 1.3.8 (#1623)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Rnwood.Smtp4dev/Rnwood.Smtp4dev.csproj

@@ -34,7 +34,7 @@
     <PackageReference Include="HtmlAgilityPack" Version="1.11.72" />
     <PackageReference Include="Jint" Version="3.0.1" />
     <PackageReference Include="Linq.Expression.Optimizer" Version="1.0.23" />
-    <PackageReference Include="LinqKit" Version="1.3.7" />
+    <PackageReference Include="LinqKit" Version="1.3.8" />
     <PackageReference Include="MailKit" Version="4.9.0" />
      <PackageReference Include="Microsoft.AspNetCore.Hosting.WindowsServices" Version="8.0.11" />
     <PackageReference Include="Microsoft.CodeAnalysis.Common" Version="4.12.0" />