chore(deps): update traefik docker tag to v2.5.7

Author: renovate-bot

src/development/stack.yml

@@ -111,7 +111,7 @@ services:
       placement:
         constraints:
         - node.role == manager
-    image: traefik:v2.5.6@sha256:2f603f8d3abe1dd3a4eb28960c55506be48293b41ea2c6ed4a4297c851a57a05
+    image: traefik:v2.5.7@sha256:7d5a6ae66572b27afe1059ce893b59acb28de70f4ce298385e153d0a398ce7f8
     ports:
     - mode: host
       protocol: tcp