Silence warning about colors.scss

Author: i80and

themes/mongodb-tutorials/src/styles/colors.scss

@@ -13,7 +13,7 @@ $green-secondary: #3c6626;
 $light-blue-primary: #edf4f7;
 $light-blue-secondary: #bcced4;
 
-$primary-shadow: rgba(0, 0, 0, 0.1);
+$primary-shadow: rgba(0, 0, 0, .1);
 
 // pygments colors
 $pygment-01: #efc;