Update organizing-information-with-collapsed-sections.md

Escape code block to allow nested code blocks correctly per [this](https://docs.github.com/en/get-started/writing-on-github/working-with-advanced-formatting/creating-and-highlighting-code-blocks#fenced-code-blocks).  Currently, copying the code and pasting into a github wiki doesn't render the code block as syntax highlighted code like the screenshot.

It looks like this:

<details><summary>CLICK ME</summary>
<p>

#### We can hide anything, even code!

    ```ruby
      puts "Hello World"
    ```

</p>
</details>

Not this:

<details><summary>CLICK ME</summary>
<p>

#### We can hide anything, even code!

```ruby
   puts "Hello World"
```

</p>
</details>

content/get-started/writing-on-github/working-with-advanced-formatting/organizing-information-with-collapsed-sections.md

@@ -16,19 +16,19 @@ You can temporarily obscure sections of your Markdown by creating a collapsed se
 
 Any Markdown within the `<details>` block will be collapsed until the reader clicks {% octicon "triangle-right" aria-label="The right triange icon" %} to expand the details. Within the `<details>` block, use the `<summary>` tag to create a label to the right of {% octicon "triangle-right" aria-label="The right triange icon" %}.
 
-```markdown
+````markdown
 <details><summary>CLICK ME</summary>
 <p>
 
 #### We can hide anything, even code!
 
-    ```ruby
+```ruby
    puts "Hello World"
-    ```
+```
 
 </p>
 </details>
-```
+````
 
 The Markdown will be collapsed by default.