fix(copy): qualify version upgrades as in-version only; major migration is a separate quote

The four 'version upgrades are run for you' lines (black-friday, hosting-offers,
hosting-2027 body + table row, llms.txt) and their JSON-LD descriptions now say
updates and in-version upgrades are included, and name a major-version migration
as a separate, quoted service. terms.html: migration = separate service, quoted
separately; release list no longer reads stale (names Odoo 20 as current).
No offer, price, page structure or ad change.

odoo-hosting-2027.html

@@ -479,7 +479,7 @@
           {
             "@type": "Product",
             "name": "Managed Odoo Community hosting",
-            "description": "Managed Odoo Community hosting: the server, backups, SSL certificate and version upgrades are run for you on one yearly price, with no per-user licence on Odoo Community.",
+            "description": "Managed Odoo Community hosting: the server, backups and SSL certificate are run for you and your Odoo is kept current within its version, on one yearly price with no per-user licence on Odoo Community. Moving to a new major version is a migration and is quoted separately.",
             "brand": { "@id": "https://odoo4projects.com/#organization" },
             "offers": [
               {
@@ -606,8 +606,9 @@
         <p class="cmp-lead">
           You should not have to become the IT department to find out what is in your stock. A business
           system is something you subscribe to, not a project you build. The server, the patches, the
-          backups, the certificate, the version upgrade: those are our job, permanently, and not an evening
-          you hand back to the company.
+          backups, the certificate, the updates within your Odoo version: those are our job, permanently,
+          and not an evening you hand back to the company. Moving the database to a new major version is a
+          migration we quote for separately.
         </p>
         <p class="cmp-lead">
           So we put your stock, your orders, your invoices and who owes you money in one place, and we keep
@@ -704,7 +705,7 @@
               </tr>
               <tr>
                 <th scope="row">Version upgrades</th>
-                <td class="is-us">A support ticket. We migrate versions 17, 18 and 19.</td>
+                <td class="is-us">Updates and in-version upgrades are included. A move to a new major version is a migration, quoted separately.</td>
                 <td>You do it, after taking a full backup.</td>
                 <td>Push to the branch; if a module update fails, Odoo reverts the server and rolls the database back.</td>
                 <td>Automatic and mandatory on Odoo's schedule.</td>