chore: upgrade to 2.5.2 and add spaces

compose.yml

@@ -1,7 +1,9 @@
+---
 version: "3.8"
+
 services:
   app:
-    image: "traefik:v2.4.11"
+    image: "traefik:v2.5.2"
     # Note(decentral1se): *please do not* add any additional ports here.
     # Doing so could break new installs with port conflicts. Please use
     # the usual `compose.$app.yml` approach for any additional ports
@@ -46,9 +48,11 @@ services:
         - "traefik.http.routers.traefik.service=api@internal"
         - "traefik.http.routers.traefik.middlewares=security@file"
         - "coop-cloud.${STACK_NAME}.app.version=v2.4.9-be23e1f6"
+
 networks:
   proxy:
     external: true
+
 configs:
   traefik_yml:
     name: ${STACK_NAME}_traefik_yml_${TRAEFIK_YML_VERSION}
@@ -62,5 +66,6 @@ configs:
     name: ${STACK_NAME}_entrypoint_${ENTRYPOINT_VERSION}
     file: entrypoint.sh.tmpl
     template_driver: golang
+
 volumes:
   letsencrypt: