ci: remove snupkg to handle NU5017 reported for symbol packages without clarifying this

NuGet/Home#10372

Author: guitarrapc

.github/workflows/build-debug.yaml

@@ -20,4 +20,4 @@ jobs:
       - uses: Cysharp/Actions/.github/actions/setup-dotnet@main
       - run: dotnet build -c Release
       - run: dotnet test -c Release --no-build
-      - run: dotnet pack -c Release --no-build -p:IncludeSymbols=true -p:SymbolPackageFormat=snupkg -o $GITHUB_WORKSPACE/artifacts
+      - run: dotnet pack -c Release --no-build -p:IncludeSymbols=true -o $GITHUB_WORKSPACE/artifacts