docs(evidence): P-014 bounded design and project-isolation falsifiers - #421

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5, actions/setup-dotnet@67a3573c9a986a3f9c594539f4ab511d57bb3ce9, actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Argument of type 'IEnumerable<string?>' cannot be used for parameter 'collection' of type 'IEnumerable<string>' in 'HashSet<string>.HashSet(IEnumerable<string> collection, IEqualityComparer<string>? comparer)' due to differences in the nullability of reference types.