I’d like to make a small modification that goes with my last PR (619) that create a sitemap index.
I realised that the xmlns url in the template is incomplete. Thus Google seems to have trouble referencing pages.
It should be:
https://www.sitemaps.org/schemas/sitemap/0.9/siteindex.xsd for the sitemap index,
https://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd for actual sitemaps.
I can send the corresponding PR if it’s ok.