Remove non-canonical docs versions from sitemap.xml

Acceptance criteria

• Board meeting minutes are accessible only on the www subdomain, not on the docs subdomain
• Community pages such as /community/desktops/ and /community/logos/ are available only on the www subdomain, not the docs subdomain
• If needed, links are updated or redirects are added to avoid 404s for these pages (investigation needed)

Original report

It looks like we may be sending confusing signals to Google by putting old docs versions in sitemap-<lang>.xml, but then telling it only one of those versions is canonical:

Google's commentary on this error: https://support.google.com/webmasters/answer/7440203#submitted_url_not_selected_as_canonical