Remove lastmod from sitemap for re-indexing

[klin2020]

Summary

After discussing different options for sitemap, a decision was reached to remove the lastmod tag from the website's sitemap. This is needed to ensure that a page's metatag "meta property=“article:published_time” …" is used during the re-indexing process, rather than the lastmod tag in the sitemap.

Follow up on PR #7801

Screenshots

Before: lastmod tag in sitemap

After: lastmod tag removed

[github-actions[bot]]

:mag: Preview in Federalist