Update building-an-awesome-image-loading-experience.mdx

Author: kentcdodds

content/blog/building-an-awesome-image-loading-experience.mdx

@@ -505,7 +505,7 @@ So I decided to add an `onload` prop 😱. Inline JavaScript in HTML is normally
 not something you want to do, but in this case it's perfect. So this is what I
 wanted to do:
 
-```tsx lines=5
+```tsx lines=4
 // ...
 const jsImgEl = React.cloneElement(img, {
 	ref: jsImgElRef,