fix(curriculum): correct hint text for step-093 penguin (#45023)

curriculum/challenges/english/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/step-093.md

@@ -13,7 +13,7 @@ Give the `.arm` elements top -left, -right, and bottom-right corners a radius of
 
 # --hints--
 
-You should give `.arm` a `border-radius` of `30% 30% 120% 30%`.
+You should give `.arm` a `border-radius` of `30% 30% 30% 120%`.
 
 ```js
 assert.equal(new __helpers.CSSHelp(document).getStyle('.arm')?.borderTopLeftRadius, '30%');