Updates to the Postmoogle documentation

roles/custom/matrix-bot-postmoogle/defaults/main.yml

@@ -81,10 +81,10 @@ matrix_bot_postmoogle_maxsize: '1024'
 # A list of admins
 # Example set of rules:
 # matrix_bot_postmoogle_admins:
-# - @someone:example.com
-# - @another:example.com
-# - @bot.*:example.com
-# - @*:another.com
+# - '@someone:example.com'
+# - '@another:example.com'
+# - '@bot.*:example.com'
+# - '@*:another.com'
 matrix_bot_postmoogle_admins: "{{ [matrix_admin] if matrix_admin else [] }}"
 
 # Sentry DSN. Deprecated, use matrix_bot_postmoogle_monitoring_sentry_dsn