Bump github.com/ethereum/go-ethereum from 1.15.0 to 1.17.5 in /seth - #2731

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/cache/restore@v4, actions/cache/save@v4, actions/checkout@v4, actions/setup-go@v5, DeterminateSystems/nix-installer-action@e50d5f73bfe71c2dd0aa4218de8f4afa59f8f81d, extractions/setup-just@dd310ad5a97d8e7b41793f8ef055398d51ad4de6. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Restore cache failed: Dependencies file is not found in /home/runner/work/chainlink-testing-framework/chainlink-testing-framework. Supported file pattern: go.sum

Cache save failed.

Failed to save: <h2>Our services aren't available right now</h2><p>We're working to restore all services as soon as possible. Please check back soon.</p>0Wm9qagAAAAAzjU/IgOTvQIs8R1K3PJM/UEhMMzBFREdFMDIxNgBFZGdl