feat(blog): publish Odoo 20 Is Live on Our Servers — Here Is What Changed

New post blog/posts/odoo-20-is-live-on-our-servers-here-is-what-changed.html
(chrome copied from blog/posts/track-the-oca-modules-you-actually-use.html,
body verbatim from the inbox source), plus the blog/index.json entry (first),
one sitemap.xml <url> and one llms.txt blog line.

sitemap.xml

@@ -78,6 +78,12 @@
     <changefreq>yearly</changefreq>
     <priority>0.4</priority>
   </url>
+  <url>
+    <loc>https://odoo4projects.com/blog/posts/odoo-20-is-live-on-our-servers-here-is-what-changed.html</loc>
+    <lastmod>2026-11-03</lastmod>
+    <changefreq>monthly</changefreq>
+    <priority>0.6</priority>
+  </url>
   <url>
     <loc>https://odoo4projects.com/blog/posts/from-a-spreadsheet-to-a-running-erp.html</loc>
     <lastmod>2026-11-02</lastmod>