Upgrade Traefik (v2.11.0-0 -> v2.11.0-1)

Ref: https://github.com/devture/com.devture.ansible.role.traefik/pull/11

Using a DNS challenge is now easier and more secure.

requirements.yml

@@ -67,7 +67,7 @@
   version: v1.0.0-0
   name: timesync
 - src: git+https://github.com/devture/com.devture.ansible.role.traefik.git
-  version: v2.11.0-0
+  version: v2.11.0-1
   name: traefik
 - src: git+https://github.com/devture/com.devture.ansible.role.traefik_certs_dumper.git
   version: v2.8.3-1