Fix Semrush Site Audit findings: redirects, email obfuscation, titles, internal links - #163

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

Summary report available at: https://github.com/sbomify/sbomify.com/actions/runs/40187998373#summary-121152790377