fix(formation): correct copy and remove inaccurate CareGame line

- Section title now anchors the "bas niveau" thread across both schools.
- Section intro: drop <em> for consistency with other section-intro blocks.
- École 42 description rewritten to surface kernel/memory/shell/security focus.
- TSRIT: remove false claim about stage transformed into CDI at CareGame
  (CareGame internship dates from 2018-2019 during 42, not 2015 TSRIT).

Co-Authored-By: Claude <noreply@anthropic.com>

index.html

@@ -1024,8 +1024,8 @@
   <section id="formation" class="formation" aria-labelledby="formation-title">
     <div class="container">
       <span class="section-label">Formation</span>
-      <h2 id="formation-title" class="section-title">Formation</h2>
-      <p class="section-intro"><em>Le socle technique derrière sept ans de production.</em></p>
+      <h2 id="formation-title" class="section-title">Deux écoles, un fil rouge : le bas niveau.</h2>
+      <p class="section-intro">Le socle technique derrière sept ans de production.</p>
 
       <ol class="timeline">
 
@@ -1035,8 +1035,8 @@
             <span>Clichy</span>
           </div>
           <h3>École 42</h3>
-          <p class="timeline-role">Programmation par projets · sans cours, sans notes</p>
-          <p class="formation-school-desc">Uniquement du code qui passe ou qui ne passe pas.</p>
+          <p class="timeline-role">Cursus en informatique fondamentale</p>
+          <p class="formation-school-desc">Kernel, mémoire, shell, sécurité — recoder pour comprendre.</p>
 
           <div class="formation-themes">
 
@@ -1098,7 +1098,6 @@
           <ul class="formation-tsrit-list">
             <li>Architecture réseau (<strong>OSI</strong>, <strong>TCP/IP</strong>), routage, commutation.</li>
             <li>Administration <strong>Linux</strong> / <strong>Windows Server</strong>, sécurité réseau, virtualisation.</li>
-            <li>Stage final transformé en <strong>CDI chez CareGame</strong>.</li>
           </ul>
         </li>