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-offers/index.html

@@ -384,7 +384,7 @@
           {
             "@type": "Product",
             "name": "On the Rise — managed Odoo Community hosting",
-            "description": "Managed Odoo Community hosting on the On the Rise plan: the server, backups, SSL certificate and version upgrades are run for you on one yearly price, with no per-user licence and no setup fee.",
+            "description": "Managed Odoo Community hosting on the On the Rise plan: 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 and no setup fee. Moving to a new major version is a migration and is quoted separately.",
             "brand": { "@id": "https://odoo4projects.com/#organization" },
             "offers": [
               {
@@ -496,7 +496,7 @@
     <section class="section-dark">
       <div class="container">
         <h2 class="section-title">What a hosting offer from us actually is</h2>
-        <p class="of-lead">A hosting offer from us is one flat price for a year. That price runs your whole business system, and we run everything under it: the server, the backups, your certificate and the version upgrades.</p>
+        <p class="of-lead">A hosting offer from us is one flat price for a year. That price runs your whole business system, and we run everything under it: the server, the backups, your certificate, and the updates that keep your Odoo current within its version. Moving to a new major version is a migration, and we quote that separately.</p>
         <p class="of-lead">What is not on the bill: a charge for each person who logs in, and a fee to set you up. Odoo Community has no per-user licence, so there is nothing per seat to pay, and there is no setup fee.</p>
         <p class="of-lead">Start with a 30-day free trial and no card. If it fits, the year starts when you pay, not when you sign up.</p>
       </div>