Add more info to the custom-color-overrides.css file.

seedlet/assets/css/custom-color-overrides.css

@@ -1,3 +1,5 @@
 /**
- * Load an empty stylesheet in order to append custom color variables via wp_add_inline_style
+ * Custom Color Overrides
+ * 
+ * This file is automatically populated if the user chooses custom colors in the Customzier.
  */