Hi!

I've noticed that in the sitemap.xml template file located at mkdocs/templates/sitemap.xml, the tag is hard-coded to "daily":

xml
Copy code
{%- for file in pages -%}
    {% if not file.page.is_link and (file.page.abs_url or file.page.canonical_url) %}
    <url>
         <loc>{% if file.page.canonical_url %}{{ file.page.canonical_url|e }}{% else %}{{ file.page.abs_url|e }}{% endif %}</loc>
         {% if file.page.update_date %}<lastmod>{{file.page.update_date}}</lastmod>{% endif %}
         <changefreq>daily</changefreq>
    </url>
    {%- endif -%}
{% endfor %}

This setting isn't ideal for sites that don't update every day. Could we have an option to customize this value?

Maybe we could set this in the mkdocs.yml, allowing different changefreq settings for various parts of the site. This would make the sitemap more accurate for sites with less frequent updates and give us more control over how search engines see our content.

Thanks for considering this idea!