Prereleases ship only to CI feed

Author: kzu

.github/workflows/publish.yml

@@ -44,7 +44,7 @@ jobs:
       - name: 🚀 nuget
         env:
           NUGET_API_KEY: ${{ secrets.NUGET_API_KEY }}
-        if: ${{ env.NUGET_API_KEY != '' && !github.event.release.draft }}
+        if: ${{ env.NUGET_API_KEY != '' && github.event.action != 'prereleased' }}
         run: dotnet nuget push ./bin/**/*.nupkg -s https://api.nuget.org/v3/index.json -k ${{secrets.NUGET_API_KEY}} --skip-duplicate
 
       - name: 🚀 sleet