typo

Configuration.md

@@ -172,7 +172,7 @@ event.hook.LightsOnAssistantCommand:
         -
             action: shell.exec
             args:
-                echo "Lights turned on" >> /your/log/file
+                cmd: echo "Lights turned on" >> /your/log/file
 ```
 
 Note how the example above uses another plugin - `shell.exec` to run a shell command. Since this plugin doesn't require any configuration, you don't have to explicitly configure it in order to use it.