add same page

target="_self"

public/home/index.html

@@ -105,7 +105,7 @@
               Find out what makes our cities Liveable, Intelligent and Sustainable - the LIS city.<br><b>
                   <i class="fas fa-user" aria-hidden="true"></i> Contact Persons</b>: <a href="https://www.hft-stuttgart.de/p/carolin-lahode" target="_blank"> Carolin Lahode,</a><a href="https://www.hft-stuttgart.de/p/sarah-ann-sutter" target="_blank"> Sarah Ann Sutter</a> <br><b>
                   <i class="fas fa-star" aria-hidden="true"></i> Keywords</b>: Smart City, Participation, LIN Stadt<br><a class="btn btn-sm btn-outline-secondary mt-1" href="stadtplanung.html" target="_blank"> 
-                  <i class="fas fa-search" aria-hidden="true"></i> Explore</a>&nbsp;&nbsp;&nbsp;<a class="btn btn-sm btn-outline-success mt-1" href="stadtplanung.html" target="_blank"> 
+                  <i class="fas fa-search" aria-hidden="true"></i> Explore</a>&nbsp;&nbsp;&nbsp;<a target="_self" class="btn btn-sm btn-outline-success mt-1" href="stadtplanung.html" target="_blank"> 
                   <i class="fas fa-project-diagram" aria-hidden="true"></i> Project</a>&nbsp;&nbsp;&nbsp;</p>
           </div>
         </div>

public/home/stadtplanung.html

@@ -31,7 +31,7 @@
     <div id="projectlogo"></div>
     <div id="projectname"></div>
   </header>
-  <a style="margin-left:50px; position: sticky;" class="btn btn-sm btn btn-dark mt-1" href="index.html" target="_blank"> 
+  <a style="margin-left:50px; position: sticky;" target="_self" class="btn btn-sm btn btn-dark mt-1" href="index.html" target="_blank"> 
     <i class="fas fa-project-diagram" aria-hidden="true"></i>	&#11164; Zurück zur Hauptseite</a>
   <div style="margin-top:-30px;" class="content">
     <h1>Handlungsleitfaden Stadtplanung</h1>