Update publish.yml

Author: kavics

.github/workflows/publish.yml

@@ -27,7 +27,7 @@ jobs:
     - name: Install .NET Core
       uses: actions/setup-dotnet@v3
       with:
-        dotnet-version: 6.0.x
+        dotnet-version: 8.0.x
 
     - name: Install dependencies
       run: dotnet restore ${{env.SOLUTION}}