Update docker.io/pretalx/standalone Docker tag to v2026

resources/chaosknoten/keycloak/nginx/keycloak-admin.hamburg.ccc.de.conf

@@ -44,8 +44,8 @@ server {
     allow 185.161.129.132/32; # z9
     allow 2a07:c480:0:100::/56; # z9
     allow 2a07:c481:1::/48; # z9 new ipv6
-    allow 213.240.180.39/32; # stb home
+    allow 213.240.180.39/32; # stbe home
-    allow 2a01:170:118b:f701::1/64; # stb home
+    allow 2a01:170:118b::1/64; # stbe home
     deny all;
 
     location ^~ / {