build(deps-dev): bump pytest from 9.0.2 to 9.1.1 - #187

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/cache/restore@v4, actions/cache/save@v4, actions/checkout@v4, actions/setup-python@v5, MishaKav/pytest-coverage-comment@v1.1.52. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/