Update changelog

CHANGELOG.md

@@ -8,7 +8,10 @@ From now on, the playbook will keep those configuration in sync for you.
 
 This means that if you were making manual changes to the `/matrix/mautrix-facebook/config.yaml` or `/matrix/mautrix-facebook/registration.yaml` configuration files, those would be lost the next time you run the playbook.
 
-You need to migrate your manual changes over to the new `matrix_mautrix_facebook_configuration_extension_yaml` variable, so that the playbook would apply them for you.
+The bridge now stores configuration in a subdirectory (`/matrix/mautrix-facebook/config`), so your old configuration remains in the base directory (`/matrix/mautrix-facebook`).
+You need to migrate any manual changes over to the new `matrix_mautrix_facebook_configuration_extension_yaml` variable, so that the playbook would apply them for you.
+
+Likewise, data is now also stored in a subdirectory (`/matrix/mautrix-facebook/data`). When you run the playbook with an existing database file (`/matrix/mautrix-facebook/mautrix-facebook.db`), the playbook will stop the bridge and relocate the database file to the `./data` directory. There's no data-loss involved. You'll need to restart the bridge manually though (`--tags=start`).
 
 
 # 2019-05-25