Adding Comment for it in defaults

roles/matrix-bridge-mautrix-facebook/defaults/main.yml

@@ -128,4 +128,5 @@ matrix_mautrix_facebook_registration_yaml: |
   de.sorunome.msc2409.push_ephemeral: true
 
 matrix_mautrix_facebook_registration: "{{ matrix_mautrix_facebook_registration_yaml|from_yaml }}"
+#Sets the default log level for the bridge
 matrix_mautrix_facebook_logging_level: DEBUG