improvement(reskin): lint issue color-hex-case

Author: dedywahyudi

src/shared/components/challenge-detail/Winners/Winner/style.scss

@@ -74,7 +74,7 @@
 }
 
 .placement {
-  background-color: #E0FAF3;
+  background-color: #e0faf3;
   border-radius: 50%;
   width: 56px;
   height: 56px;