fix: correct Fleet EV reference flow link (fleet-ev-reference-flow)

Made-with: Cursor

Author: NAOR YUVAL

index.html

@@ -318,7 +318,8 @@ <h2>The problem</h2>
       <h2>How MPCP works</h2>
       <p>A payment is accepted only if the recipient can verify a chain of signed artifacts. Each step narrows what the machine is allowed to do. As shown above, MPCP flows from policy through budget and payment authorization to settlement.</p>
       <p><strong>MPCP is to machine payments what OAuth is to API authorization.</strong></p>
-      <a href="/spec/architecture/reference-flow/" class="dive-in">View the end-to-end MPCP flow →</a>
+      <a href="/spec/architecture/fleet-ev-reference-flow/" class="dive-in">View the Fleet-EV reference flow →</a>
+      <a href="/spec/architecture/human-agent-reference-flow/" class="dive-in">View the Human-Agent reference flow →</a>
     </section>
 
     <section>