Add border/checkpoint use case to Perfect For section

Co-authored-by: seanieb <191516+seanieb@users.noreply.github.com>

Author: Copilot

index.html

@@ -103,6 +103,7 @@ <h3>Secure</h3>
             <div class="container">
                 <h2>Perfect For</h2>
                 <ul class="use-case-list">
+                    <li>🛂 Approaching country borders or police checkpoints (faster than shutdown)</li>
                     <li>🏢 When someone unexpectedly enters your workspace</li>
                     <li>☕ Stepping away in a public place like a café</li>
                     <li>🔒 Handling sensitive information that requires extra security</li>