sdk publishing is broken

[ViktorHofer]

.sha512 files have the wrong filename (they are named the same as the original files) and are placed in the wrong folder.

I think that's the reason for the broken official builds: https://dnceng.visualstudio.com/internal/_build?definitionId=140

[dotnet-issue-labeler]

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.

[dotnet-issue-labeler]

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.