Add .NET8 to CI

Author: mauroservienti

.github/workflows/ci.yml

@@ -34,6 +34,7 @@ jobs:
           dotnet-version: |
             6.0.x
             7.0.x
+            8.0.x
       - name: Build
         run: dotnet build src --configuration Release
       - name: Tests
@@ -51,10 +52,10 @@ jobs:
     if: startsWith(github.ref, 'refs/tags')
     runs-on: ubuntu-20.04
     steps:
-      - name: Setup .NET 6
+      - name: Setup .NET
         uses: actions/[email protected]
         with:
-          dotnet-version: 6.0.x
+          dotnet-version: 8.0.x
       - name: Download artifacts
         uses: actions/[email protected]
         with: