Update release.yml

Author: Cadabra

.github/workflows/release.yml

@@ -22,6 +22,10 @@ jobs:
       uses: actions/setup-dotnet@v1
       with:
         dotnet-version: '6.0.x'
+    - name: Setup .NET 8.0
+      uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: '8.0.x'
     - name: Restore dependencies
       run: dotnet restore
     - name: Build