Update draft_release.yml to dotnet 8

Author: eprilx

.github/workflows/draft_release.yml

@@ -16,7 +16,7 @@ jobs:
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 5.0.x
+        dotnet-version: 8.0.x
     - uses: microsoft/[email protected]
 
      # environmental variables