Update index.html

Author: ZenterFlow

index.html

@@ -46,6 +46,7 @@ <h2>3. The Cast of Characters and Their Jobs</h2>
     <img src="images/DeclarativeStack.jpg" alt="Diagram of declarative stack pipeline">
     <figcaption style="text-align:center;font-size:0.8rem;color:#9ca3af;">Table: A Declarative Software Stack</figcaption>
   </figure>
+  <h2>3. How the Characters relate to Each Other</h2>
 
   <p>You’ve probably heard the buzzwords: <strong>GitOps</strong>, <strong>NoOps</strong>, <strong>immutable infrastructure</strong> …</p>