aurweb: bump aurweb to 6.2.16

roles/aurweb/defaults/main.yml

@@ -8,7 +8,7 @@ aurweb_conf_dir: '/etc/aurweb'
 aurweb_git_dir: "{{ aurweb_dir }}/aur.git"
 aurweb_git_hook: '/usr/local/bin/aurweb-git-update'
 aurweb_nginx_conf: '/etc/nginx/nginx.d/aurweb.conf'
-aurweb_version: 'v6.2.15'
+aurweb_version: 'v6.2.16'
 aurweb_pgp_keys: [
   '2191B89431BAC0A8B96DE93D244740D17C7FD0EC', # artafinde
   'DB650286BD9EAE39890D3FE6FE3DC1668CB24956', # klausenbusk