Update docs/configuring-playbook-livekit-server.md

Co-authored-by: Suguru Hirahara <luixxiul@users.noreply.github.com>

docs/configuring-playbook-livekit-server.md

@@ -27,9 +27,9 @@ Add the following configuration to your `inventory/host_vars/matrix.DOMAIN/vars.
 
 ```yaml
 matrix_livekit_server_enabled: true
+
 # Set a secure key for LiveKit authentication
 matrix_element_call_livekit_dev_key: 'your-secure-livekit-key'
-```
 
 ## Installing