Closes #5211 - Fix HTTP to HTTPS redirection in Apache2 conf file

contrib/apache2/zammad_ssl.conf

@@ -9,7 +9,7 @@ ServerTokens Prod
 
 <VirtualHost *:80>
     ServerName example.com
-    Redirect permanent / https://example.com
+    Redirect permanent / https://example.com/
 </VirtualHost>
 
 <VirtualHost *:443>