feat(bootcamp): state the 6-seat cohort cap and add the Black Friday call-out (EN)

- bootcamp page: Class size fact row (Limited to 6 participants), a cap line by
  the price, JSON-LD CourseInstance maximumAttendeeCapacity: 6, and a compact
  Black Friday call-out (16-30 Nov 2026, second hosted year + $100 off BF2026,
  six seats) with the landing-page slot left open for olchi
- workshops page: the cap on the bootcamp card and a Class size comparison row
- llms.txt: durable 'limited to six participants per cohort' on the bootcamp line
  (evergreen - no dated Black Friday offer in llms.txt)

odoo-erp-automation-bootcamp/index.html

@@ -482,6 +482,7 @@
               "@type": "CourseInstance",
               "courseMode": "online",
               "courseWorkload": "PT1H",
+              "maximumAttendeeCapacity": 6,
               "startDate": "2027-01-21",
               "endDate": "2027-03-25",
               "instructor": {
@@ -725,6 +726,13 @@
         <p class="bc-note on-dark">
           <strong>Adding capability later:</strong> our guide to <a href="/blog/posts/howto-custom-module.html">installing custom Odoo modules from Git</a> shows both routes — Quick Git for a zip you bought, Git for a developer.
         </p>
+        <ul class="bc-cards">
+          <li>
+            <h3>Black Friday, 16&ndash;30 November 2026.</h3>
+            <p>Book inside the window and a <strong>second year of hosted Odoo Community Edition</strong> is added on top of the year included in the programme, and <strong>$100 comes off</strong> with code <strong>BF2026</strong>. Six seats only.</p>
+            <!-- OPEN-SLOT(olchi): link to the Black Friday landing page -->
+          </li>
+        </ul>
       </div>
     </section>
 
@@ -750,6 +758,8 @@
           <dd>1 hour per session, 10 hours total</dd>
           <dt>Where</dt>
           <dd>Live and online</dd>
+          <dt>Class size</dt>
+          <dd>Limited to 6 participants</dd>
           <dt>Instructor</dt>
           <dd>Oliver - The OC Guy - Arnold, Technical Lead at ODOO4projects</dd>
         </dl>
@@ -784,6 +794,7 @@
       <div class="container">
         <h2 class="section-title">Price and booking</h2>
         <p class="bc-price">The programme costs USD 465.00 for all ten sessions.</p>
+        <p class="bc-note"><strong>Limited to 6 participants</strong> &mdash; the cohort is capped, so the instructor can work through your own setup.</p>
         <p class="bc-lead">
           Covers the full programme: ten live sessions, one year of hosted Odoo Community Edition, the
           alumni community and the expert review.