Update tox requirement from <4.65,>=4.16.0 to >=4.16.0,<4.66 - #665

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

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