fix(curriculum): Css fix for issue #43517: Example css code does not demonstrate hover animation (#43524)

* fix question example code for id: 587d78a7367417b2b2512ae0

* Revert "fix question example code for id: 587d78a7367417b2b2512ae0"

This reverts commit c99edf8609.

* modifying only the english version of button hover example

* change to keep css looking consistent

curriculum/challenges/english/01-responsive-web-design/applied-visual-design/use-css-animation-to-change-the-hover-state-of-a-button.md

@@ -15,6 +15,9 @@ Here's an example of changing the width of an image on hover:
 
 ```html
 <style>
+  img {
+    width: 30px;
+  }
   img:hover {
     animation-name: width;
     animation-duration: 500ms;