Remove finished HIFIS job offer ads

_data/navigation.yml

@@ -32,8 +32,8 @@ header:
         - title: Contact
           url: "contact.html"
 
-        - title: Jobs <i class="fas fa-bell"></i>
-          url: "job_offers.html"
+        - title: Jobs
+          url: "https://www.helmholtz.de/en/jobs_talent/job_vacancies/"
 
         - title: <i class="fas fa-search"></i>
           url: "search.html"