Issue 2874

[anisa-hawes]

I am adding alert-warning boxes to the following lessons to help readers avoid a potential security exploit:

• /en/lessons/building-static-sites-with-jekyll-github-pages
• /es/lecciones/sitios-estaticos-con-jekyll-y-github-pages
• /en/lessons/collaborative-blog-with-jekyll-github

---

Dear @rivaquiroga and @jenniferisasi,

I would be grateful for your help to check/correct my Spanish translation of the warning text:

<div class="alert alert-warning">
If you set up a custom domain with your GitHub Pages-hosted website, to avoid a known security exploit please make sure to also read and follow the steps in <a href='https://docs.github.com/en/pages/configuring-a-custom-domain-for-your-github-pages-site/verifying-your-custom-domain-for-github-pages'>GitHub’s documentation</a> to both verify your domain and avoid using wildcard DNS records.
</div>

<div class="alert alert-warning">
Si configuras un dominio personalizado con tu sitio web alojado en GitHub Pages, para evitar un fallo de seguridad conocido, asegúrate de leer y seguir los pasos de <a href='https://docs.github.com/en/pages/configuring-a-custom-domain-for-your-github-pages-site/verifying-your-custom-domain-for-github-pages'>la documentación de GitHub</a> para verificar tu dominio y evitar el uso de registros DNS comodín.
</div>

With thanks, Anisa

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Closes #2874

Checklist

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[rivaquiroga]

Done!