Fix comment in doco.yml

---

Migrated from D7014 (view on Phabricator)

docker/docker-compose.yml

@@ -427,9 +427,9 @@ services:
       - "./conf/lister.yml:/lister.yml:ro"
       - "./services/swh-listers-worker/entrypoint.sh:/entrypoint.sh:ro"
 
-  # Http server to host the maven extracted index for the maven lister
 
   swh-lister-maven-nginx:
+    # Http server to host the maven extracted index for the maven lister
     image: nginx
     volumes:
       - "./conf/maven_index/:/usr/share/nginx/html:ro"