Release 68  do not compile Release 67 works with Ubuntu 18
hello,

i download the release 68 and want to compile under ubuntu 18.

Errormessage::

...
  Determining projects to restore...                                                                                                 
  Restored /home/user/src/github.com/miningcore/src/Miningcore.Tests/Miningcore.Tests.csproj (in 780 ms).                            
  1 of 2 projects are up-to-date for restore.                                                                                        
/usr/share/dotnet/sdk/6.0.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(267,5): error NETSDK1005: 
Assets file '/home/user/src/github.com/miningcore/src/Miningcore/obj/project.assets.json' doesn't have a target for 'net5.0'. Ensure 
that restore has run and that you have included 'net5.0' in the TargetFrameworks for your project. [/home/user/src/github.com/miningc
ore/src/Miningcore/Miningcore.csproj]
/usr/share/dotnet/sdk/6.0.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(267,5): error NETSDK1005: 
Assets file '/home/user/src/github.com/miningcore/src/Miningcore.Tests/obj/project.assets.json' doesn't have a target for 'net5.0'. E
nsure that restore has run and that you have included 'net5.0' in the TargetFrameworks for your project. [/home/user/src/github.com/m
iningcore/src/Miningcore.Tests/Miningcore.Tests.csproj]

the release 67 works perfect with the script build-ubuntu-20.04.sh!

what is changed?