fix: remove OL for code fences (mdn#20324)

files/en-us/learn/common_questions/what_are_browser_developer_tools/index.md

@@ -183,35 +183,35 @@ This will give you a window like the following:
 
 To see what happens, try entering the following snippets of code into the console one by one (and then pressing Enter):
 
-1. ```js
-    alert('hello!');
-    ```
+```js
+alert('hello!');
+```
 
-2. ```js
-    document.querySelector('html').style.backgroundColor = 'purple';
-    ```
+```js
+document.querySelector('html').style.backgroundColor = 'purple';
+```
 
-3. ```js
-    const myWordmark = document.createElement('img');
-    myWordmark.setAttribute('src','https://blog.mozilla.org/press/wp-content/themes/OneMozilla/img/mozilla-wordmark.png');
-    document.querySelector('h1').appendChild(myWordmark);
-    ```
+```js
+const myWordmark = document.createElement('img');
+myWordmark.setAttribute('src','https://blog.mozilla.org/press/wp-content/themes/OneMozilla/img/mozilla-wordmark.png');
+document.querySelector('h1').appendChild(myWordmark);
+```
 
 Now try entering the following incorrect versions of the code and see what you get.
 
-1. ```js example-bad
-    alert('hello!);
-    ```
+```js example-bad
+alert('hello!);
+```
 
-2. ```js example-bad
-    document.cheeseSelector('html').style.backgroundColor = 'purple';
-    ```
+```js example-bad
+document.cheeseSelector('html').style.backgroundColor = 'purple';
+```
 
-3. ```js example-bad
-    const myWordmark = document.createElement('img');
-    myBanana.setAttribute('src','https://blog.mozilla.org/press/wp-content/themes/OneMozilla/img/mozilla-wordmark.png');
-    document.querySelector('h1').appendChild(myWordmark);
-    ```
+```js example-bad
+const myWordmark = document.createElement('img');
+myBanana.setAttribute('src','https://blog.mozilla.org/press/wp-content/themes/OneMozilla/img/mozilla-wordmark.png');
+document.querySelector('h1').appendChild(myWordmark);
+```
 
 You'll start to see the kind of errors that the browser returns. Often these errors are fairly cryptic, but it should be pretty simple to figure these problems out!