[FS-10] Refactor: rebuild scan qr code alert

app/views/admin/attendances/form.html.erb

@@ -1,10 +1,10 @@
-
-<div class="alert alert-info d-flex" role="alert">
-  <i class="bi bi-qr-code-scan display-1" style="font-size: 5em"></i>
-
-  <div class="p-3 ms-3">
-    <%= tag.h4 t('.title'), class: "alert-heading" %>
-    <%= tag.p t('.description'), class: "mb-0" %>
+<div class="alert alert-info d-flex align-items-center" role="alert">
+  <div class="flex-shrink-0 me-3">
+    <i class="bi bi-qr-code-scan display-1" style="font-size: 5rem"></i>
+  </div>
+  <div class="flex-grow-1 ms-3">
+    <h4><%= t('.title') %></h4>
+    <p><%= t('.description') %></p>
   </div>
 </div>