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.

llms.txt

@@ -1,9 +1,10 @@
 # ODOO4projects
 
 > ODOO4projects is a managed Odoo Community hosting service. We run the server, the backups, the
-> SSL certificate and the version upgrades for a monthly-or-yearly price, so the customer does not
-> have to administer a server. One login: everything happens inside the customer's own Odoo
-> instance. We do not sell Odoo itself; we sell a business system that runs.
+> SSL certificate and the updates that keep your Odoo current within its version, for a monthly-or-
+> yearly price, so the customer does not have to administer a server. Moving to a new major version
+> is a migration and is quoted separately. One login: everything happens inside the customer's own
+> Odoo instance. We do not sell Odoo itself; we sell a business system that runs.
 
 ## Products and pricing (verified 2026-10-21, list prices, USD, VAT excluded)