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.

blog/index.json

@@ -1,5 +1,14 @@
 {
   "posts": [
+    {
+      "id": "odoo-20-is-live-on-our-servers-here-is-what-changed",
+      "date": "2026-11-03",
+      "area": "news",
+      "headline": "Odoo 20 Is Live on Our Servers — Here Is What Changed",
+      "teaser": "Two weeks. That is how long it took us to bring up Odoo 20 on our servers, with every new feature that comes with it. It",
+      "link": "blog/posts/odoo-20-is-live-on-our-servers-here-is-what-changed.html",
+      "image": "https://image.office.odoo4projects.com/img/ODOO_20_chatter.png"
+    },
     {
       "id": "from-a-spreadsheet-to-a-running-erp",
       "date": "2026-11-02",