fix old course link

Author: orabe

vergangene_kurse/java4/java_4_anmeldung.html

@@ -350,7 +350,7 @@ <h4 class="h4 timeline-item-title">3. Warteliste</h4>
                                 <div class="info-content">
                                     <p class="externial_link">
                                         <a style="color:rgb(253, 73, 73);" target="_blank" rel="noopener noreferrer"
-                                            href="https://docs.google.com/forms/d/e/1FAIpQLSfoQnlT1eIfGM62blwxzFgPJ7v7gr_4VQ0J__EG5eC6ZNmOTA/viewform?usp=share_link">Link
+                                            href="https://docs.google.com/forms/d/e/1FAIpQLSe2vLaR5LcxqzO8_mTC98ya252_BQOztolGy4lY-UbbG1TfYA/viewform?usp=sf_link">Link
                                             zur Warteliste
 
                                         </a>