Bump black, pytest, idna, and urllib3 for Dependabot alerts - #565

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@f095bcc56b7c2baf48f3ac70d6d6782f4f553222, github/codeql-action/analyze@6cfb483131f3f74950a251876da81c79a6fcbdec, github/codeql-action/init@6cfb483131f3f74950a251876da81c79a6fcbdec. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

1 issue was detected with this workflow: git checkout HEAD^2 is no longer necessary. Please remove this step as Code Scanning recommends analyzing the merge commit for best results.