fix(seo): drop dead /alternatives + jupiter-vs-raydium compare - #749

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, actions/setup-node@v4, pnpm/action-setup@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Expected an assignment or function call and instead saw an expression

React Hook useMemo has a missing dependency: 'zoom'. Either include it or remove the dependency array