Bump System.Data.SqlClient from 4.8.5 to 4.8.6 in /src/PdfRpt.Core

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/PdfRpt.Core/PdfRpt.Core.csproj

@@ -31,7 +31,7 @@
   </ItemGroup>
   <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.0' ">
     <PackageReference Include="System.ComponentModel.Annotations" Version="5.0.0" />
-    <PackageReference Include="System.Data.SqlClient" Version="4.8.5" />
+    <PackageReference Include="System.Data.SqlClient" Version="4.8.6" />
     <PackageReference Include="System.Xml.XPath.XDocument" Version="4.3.0" />
     <PackageReference Include="BouncyCastle.Cryptography" Version="2.2.1" />
     <PackageReference Include="iTextSharp.LGPLv2.Core" Version="3.4.12" />