fix(bf): keep the code out of the served source — strip HOST27 from the two build comments

The Bootcamp note comment and its inline [OPEN-SLOT: …] marker named the code
HOST27 in the served HTML, so view-source leaked it before anyone opened the
reveal. Both mark the same still-open decision (BOOTCAMP-CONFIRM / bootcamp BF
price line), so the markers are kept and rewritten without the code string.
The reveal content that names the code on open is untouched.

odoo-black-friday/index.html

@@ -540,10 +540,10 @@
               <p class="bf-price"><strong>USD 465.00</strong> for the full programme. Black Friday adds <strong>a second year of hosted Odoo Community Edition</strong>, on top of the one already included.</p>
               <p class="bf-included">Ten live Thursday sessions, 18:00–19:00 Central Time, starting Thursday 21 January 2027. Six seats, and no more. Your first hosted year is included as standard; the second year is the Black Friday add-on.</p>
               <!-- Bootcamp mechanism string — ONE reusable line, isolated exactly as the Hosting box's is
-                   (copy §3b). Whether HOST27 applies to the Bootcamp is UNCONFIRMED (BOOTCAMP-CONFIRM), so
-                   the discounted figure stays a build placeholder and is NOT printed. Swap this one line
-                   when it is confirmed. -->
-              <p class="bf-mechanism">Black Friday: <strong>a second year of hosted Odoo Community Edition</strong>. One redemption per customer.<!-- [OPEN-SLOT: bootcamp Black Friday price — USD 365.00 if code HOST27 applies to the programme too; unconfirmed] --></p>
+                   (copy §3b). Whether the discount code applies to the Bootcamp is UNCONFIRMED
+                   (BOOTCAMP-CONFIRM), so the discounted figure stays a build placeholder and is NOT
+                   printed. Swap this one line when it is confirmed. -->
+              <p class="bf-mechanism">Black Friday: <strong>a second year of hosted Odoo Community Edition</strong>. One redemption per customer.<!-- OPEN-SLOT: bootcamp Black Friday price line --></p>
               <p class="bf-deadline">Ends Monday 30 November 2026.</p>
               <p class="bf-cta"><a href="/odoo-erp-automation-bootcamp/">See the Bootcamp and what you build</a></p>
             </div>