pipleine fix

Author: mihaj

.github/workflows/dotnet-core.yml

@@ -47,10 +47,10 @@ jobs:
       uses: actions/setup-dotnet@v1
       with:
         dotnet-version: '3.1.x'
-    - name: Setup .NET Core 5.0
+    - name: Setup .NET Core 6.0
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: '5.0.x'
+        dotnet-version: '6.0.x'
     - name: Pack NuGet
       uses: brandedoutcast/publish-nuget@v2.5.5
       with: