fix: add list block example

Author: mcanouil

docs/authoring/markdown-basics.qmd

@@ -136,6 +136,15 @@ This document provides examples of the most commonly used markdown syntax. See t
 | ```                               |                                 |
 +-----------------------------------+---------------------------------+
 | ``` 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                    |
 | - [x] Task 2                      | - [x] Task 2                    |
 | ```                               |                                 |