Remove hardcoded username reference

nodes/zammad-config.html

@@ -46,7 +46,7 @@
     <div id="zammad-basic-section" style="display:none;">
         <div class="form-row">
             <label for="node-config-input-username"><i class="fa fa-user"></i> Username</label>
-            <input type="text" id="node-config-input-username" placeholder="Hannes">
+            <input type="text" id="node-config-input-username" placeholder="Username">
         </div>
         <div class="form-row">
             <label for="node-config-input-password"><i class="fa fa-key"></i> Password</label>
@@ -62,6 +62,6 @@
     <ul>
 <li><b>Base URL</b> – Your Zammad API v1 URL, e.g. <code>https://example.com/api/v1</code></li>
             <li><b>Token Auth</b> – Preferred. Create token with <code>ticket.agent</code> permission.</li>
-        <li><b>Basic Auth</b> – Username is typically just <code>Hannes</code> (not full email).</li>
+        <li><b>Basic Auth</b> – Zammad username (may differ from email address).</li>
     </ul>
 </script>