fix: code block inside list example

Author: mcanouil

docs/authoring/markdown-basics.qmd

@@ -135,14 +135,16 @@ This document provides examples of the most commonly used markdown syntax. See t
 |       A. sub-sub-item 1           |        A. sub-sub-item 1        |
 | ```                               |                                 |
 +-----------------------------------+---------------------------------+
-| ``` markdown                      |                                 |
+| ```` markdown                     |                                 |
 | 1. ordered list                   |  1. ordered list                |
 | 2. item 2                         |  2. item 2                      |
+|                                   |                                 |
 |    ```python                      |     ```python                   |
 |    print("Hello, World!")         |     print("Hello, World!")      |
 |    ```                            |     ```                         |
+|                                   |                                 |
 |    A. sub-sub-item 1              |     A. sub-sub-item 1           |
-| ```                               |                                 |
+| ````                              |                                 |
 +-----------------------------------+---------------------------------+
 | ``` markdown                      |                                 |
 | - [ ] Task 1                      | - [ ] Task 1                    |