add cypress-flake-fixer skill - #4870

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/github-script@f28e40c7f34bde8b3046d885e986cb6290c5673b, actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Waiting on review (merge-risk:high): needs 1 more approval(s); an approval from a maintainer with admin or maintain permission