Bump System.Security.Cryptography.Xml from 4.5.0 to 4.6.0

Bumps [System.Security.Cryptography.Xml](https://github.com/dotnet/corefx) from 4.5.0 to 4.6.0.
- [Release notes](https://github.com/dotnet/corefx/releases)
- [Commits](https://github.com/dotnet/corefx/commits)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

Digipost.Signature.Api.Client.Core/Digipost.Signature.Api.Client.Core.csproj

@@ -9,7 +9,7 @@
         <PackageReference Include="api-client-shared" Version="4.0.0"/>
         <PackageReference Include="Microsoft.AspNet.WebApi.Client" Version="5.2.7"/>
         <PackageReference Include="System.Net.Requests" Version="4.3.0"/>
-        <PackageReference Include="System.Security.Cryptography.Xml" Version="4.5.0"/>
+        <PackageReference Include="System.Security.Cryptography.Xml" Version="4.6.0"/>
 
         <PackageReference Include="NLog" Version="4.6.7"/>
         <PackageReference Include="NLog.Extensions.Logging" Version="1.5.4"/>