Update all stable non-major dependencies

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

@@ -2,7 +2,7 @@
 services:
 
   prometheus:
-    image: docker.io/prom/prometheus:v3.10.0
+    image: docker.io/prom/prometheus:v3.11.1
     container_name: prometheus
     command:
       - '--config.file=/etc/prometheus/prometheus.yml'

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

@@ -1,7 +1,7 @@
 ---
 services:
   ntfy:
-    image: docker.io/binwiederhier/ntfy:v2.20.1
+    image: docker.io/binwiederhier/ntfy:v2.21.0
     container_name: ntfy
     command:
       - serve

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

@@ -23,7 +23,7 @@ services:
       - pretalx_net
 
   static:
-    image: docker.io/library/nginx:1.29.7
+    image: docker.io/library/nginx:1.29.8
     restart: unless-stopped
     volumes:
       - public:/usr/share/nginx/html