newsletters: Use correct image path for CSS counters demo

src/content/newsletters/2024-07-31.mdx

@@ -79,7 +79,9 @@ This makes the interactive part of the Acid2 test finally work as intended. (You
 
 This month, we gained some basic support for CSS counters. Numbered lists have been a part of HTML since the early days, but more recently CSS gave web authors the ability to create their own automatically-incrementing counters using the `counter-set`, `counter-reset`, and `counter-increment` properties, and display them on the page with the `counter()` and `counters()` in the `content` property. A common use for this is to automatically number page headings.
 
-While not complete, we now support enough of this that we are able to use it for the line numbers of Ladybird’s “view source” feature\!![][image1]
+While not complete, we now support enough of this that we are able to use it for the line numbers of Ladybird’s “view source” feature\!
+
+![](/assets/img/counters.png)
 
 ### More CSS color functions