Removed not keyword in conditionals - #346

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@dc323e67f16fb5f7663d20ff7941f27f5809e9b6. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/