Update docker.io/pretalx/standalone Docker tag to v2025.2.3

resources/chaosknoten/pad/docker_compose/compose.yaml.j2

@@ -3,13 +3,13 @@
 
 services:
   database:
-    image: docker.io/library/postgres:15-alpine
+    image: docker.io/library/postgres:18-alpine
     environment:
       - "POSTGRES_USER=hedgedoc"
       - "POSTGRES_PASSWORD={{ secret__hedgedoc_db_password }}"
       - "POSTGRES_DB=hedgedoc"
     volumes:
-      - database:/var/lib/postgresql/data
+      - database:/var/lib/postgresql
     restart: unless-stopped
 
   app:

resources/chaosknoten/pretalx/docker_compose/compose.yaml.j2

@@ -33,7 +33,7 @@ services:
       - pretalx_net
 
   pretalx:
-    image: docker.io/pretalx/standalone:v2025.1.0
+    image: docker.io/pretalx/standalone:v2025.2.3
     entrypoint: gunicorn
     command:
       - "pretalx.wsgi"
@@ -78,7 +78,7 @@ services:
       - pretalx_net
 
   celery:
-    image: docker.io/pretalx/standalone:v2025.1.0
+    image: docker.io/pretalx/standalone:v2025.2.3
     command:
       - taskworker
     restart: unless-stopped