Fix MSBuild does not copy xunit.runner dlls correctly#5747

Aaronontheweb merged 1 commit intoakkadotnet:devakkadotnet/akka.net:devfrom

Arkatufus:MNTR_Fix_missing_xunit.runnerArkatufus/akka.net:MNTR_Fix_missing_xunit.runnerCopy head branch name to clipboard