Changes guided tour link from ID to class. Needed for #8554

Change-Id: I7e99bac6555abec271daca09ebd8323074b34f3d
diff --git a/templates/intro.html.ep b/templates/intro.html.ep
index 1ecab62..f0f0896 100644
--- a/templates/intro.html.ep
+++ b/templates/intro.html.ep
@@ -6,7 +6,7 @@
 
   <p><noscript>KorAP expects activated JavaScript for some features.</noscript></p>
 
-  <p><strong>New to KorAP?</strong> Please check out our <a id="link-guided-tour">guided tour</a> or our <%= doc_opener 'ql', begin %>tutorial<% end %>!</p>
+  <p><strong>New to KorAP?</strong> Please check out our <a class="link-guided-tour">guided tour</a> or our <%= doc_opener 'ql', begin %>tutorial<% end %>!</p>
   
   %= include 'announcement', lang => 'en'