update nginx role

roles/stable/etherpad/tasks/main.yml

@@ -20,7 +20,7 @@
   git:
     repo: "https://github.com/ether/etherpad-lite"
     dest: "/srv/etherpad/etherpad"
-    version: "1.8.7"
+    version: "1.8.14"
     force: true
   become: true
   become_user: "etherpad"