Update all stable non-major dependencies

resources/chaosknoten/draupnir/docker_compose/compose.yaml

@@ -3,7 +3,7 @@
 
 services:
   draupnir:
-    image: ghcr.io/the-draupnir-project/draupnir:v3.2.0
+    image: ghcr.io/the-draupnir-project/draupnir:v3.1.0
     command: [ "bot", "--draupnir-config", "/etc/draupnir/production.yaml" ]
     restart: unless-stopped
     volumes:

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

@@ -23,7 +23,7 @@ services:
       - pretalx_net
 
   static:
-    image: docker.io/library/nginx:1.31.7
+    image: docker.io/library/nginx:1.31.6
     restart: unless-stopped
     volumes:
       - public:/usr/share/nginx/html