Add active scale effect to animate-img (#40878)

* Add active scale effect to animate-img

* Update _masthead.scss

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Co-authored-by: Mark Otto <[email protected]>

Author: MohamadSalman11

site/assets/scss/_masthead.scss

@@ -108,6 +108,10 @@
   &:hover > img {
     transform: scale(1.1);
   }
+
+  &:active > img {
+    transform: scale(1);
+  }
 }
 
 @if $enable-dark-mode {