Allow dotnet pre-release version

Author: andriivitiv

.github/workflows/build-and-publish.yml

@@ -27,6 +27,7 @@ jobs:
       uses: actions/setup-dotnet@v1
       with:
         dotnet-version: '6.0.x'
+        include-prerelease: true
 
     - name: dotnet restore
       run: dotnet restore