letsencrypt: fix domain list not generated

ansible/roles/letsencrypt/tasks/main.yml

@@ -13,7 +13,7 @@
   shell:
     executable: /bin/bash
     cmd: >
-      set -o pipefail
+      set -o pipefail;
       nginx -T 2>&1 | grep -v localhost | grep -P '^\s+server_name\s+.*;$' | sed -r 's/\s+server_name\s+(.*);/\1/' | uniq
 
 - name: save result as list