ci(actions): Bump actions/stale from 9 to 11 - #30

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/cache@v4, actions/checkout@v4, actions/setup-dotnet@v4, actions/upload-artifact@v4, codecov/codecov-action@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Codecov: Failed to properly upload report: The process 'D:\a\_actions\codecov\codecov-action\v4\dist\codecov.exe' failed with exit code 2

A publish profile with the name 'win-x64.pubxml' was not found in the project. Set the PublishProfile property to a valid file name.