Fix the addition of the rich handler (SkafteNicki#227)

The handlers list is stored under logger.root, not the logger itself.

s4_debugging_and_logging/logging.md

@@ -196,10 +196,10 @@ If you need help for the exercises you can find a simple solution script
     script:
 
     ```python
-    logger.handlers[0] = RichHandler(markup=True)  # set rich handler
+    logger.root.handlers[0] = RichHandler(markup=True)  # set rich handler
     ```
 
-    and try re-running the script. Hopefully you should see something buitiful in your terminal like this:
+    and try re-running the script. Hopefully you should see something beautiful in your terminal like this:
 
     <figure markdown>
     ![Image](../figures/rich_terminal_logging.png){ width="700" }