fix: improved external/internal indicators

_layouts/landing.html

@@ -42,14 +42,14 @@
       <main class="page-content" aria-label="Content" style="margin-right: 0%">
         {% if site.internal %}
         <div class="indicator tooltip" id="external-indicator">
-            <i class="material-icons">lock_open</i>
+            <i class="material-icons">verified</i>
             <span class="tooltip-text">
                 You are connected to the uni.lu network. <br />You see all the cards.
             </span>
         </div>
         {% else %}
         <div class="indicator tooltip" id="internal-indicator">
-            <i class="material-icons">lock</i>
+            <i class="material-icons">unpublished</i>
             <span class="tooltip-text">
                 You are <strong>not connected</strong> to the uni.lu network. <br />You see only publically-available cards. <br />In order to see all, please connect to the VPN.
             </span>