Add: change placehodler link in developer Card of "Jona Walpert" to his homepage

outreach/index.html

@@ -154,8 +154,8 @@ java -jar casono.jar client <serverip>:<serverport> [username]
                     <h3>Lars Winzer</h3>
                     <p>Server architecture & Server side networking</p>
                 </a>
-                <a class="team-member team-member-link" href="https://git.scicore.unibas.ch/cs108-fs26/Gruppe-13"
-                    target="_blank" rel="noopener noreferrer" data-aos="fade-up" data-aos-delay="200">
+                <a class="team-member team-member-link" href="https://jona.walpert.ch/" target="_blank"
+                    rel="noopener noreferrer" data-aos="fade-up" data-aos-delay="200">
                     <img src="images/team/jona.svg" alt="Jona Walpert" class="team-photo" loading="lazy">
                     <h3>Jona Walpert</h3>
                     <p>UI & UX Design</p>