Bump System.Data.SqlClient from 4.8.5 to 4.8.6 in /src/NReco.Data.Tests

Bumps [System.Data.SqlClient](https://github.com/dotnet/corefx) from 4.8.5 to 4.8.6.
- [Release notes](https://github.com/dotnet/corefx/releases)
- [Commits](https://github.com/dotnet/corefx/commits)

---
updated-dependencies:
- dependency-name: System.Data.SqlClient
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

src/NReco.Data.Tests/NReco.Data.Tests.csproj

@@ -14,7 +14,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3" />
     <PackageReference Include="xunit" Version="2.6.1" />
-    <PackageReference Include="System.Data.SqlClient" Version="4.8.5" />
+    <PackageReference Include="System.Data.SqlClient" Version="4.8.6" />
     <PackageReference Include="Microsoft.Data.Sqlite" Version="6.0.25" />
     <PackageReference Include="System.ComponentModel.Annotations" Version="4.4.0" />
   </ItemGroup>