Update all stable non-major dependencies

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

@@ -23,7 +23,7 @@ services:
       - pretalx_net
 
   static:
-    image: docker.io/library/nginx:1.29.2@sha256:029d4461bd98f124e531380505ceea2072418fdf28752aa73b7b273ba3048903
+    image: docker.io/library/nginx:1.29.3@sha256:806be66a0949aec4cc31afd209a57b23167feb26a78168d77a6021ac31e53711
     restart: unless-stopped
     volumes:
       - public:/usr/share/nginx/html