fix CI error

templates/partials/style.css

@@ -1,7 +1,7 @@
 @import url(https://fonts.googleapis.com/css?family=Open+Sans:300,400,500,600,700);
 
 .emailBody {
-  background: #F3F3F3 !important;
+  background: #FFFFFF !important;
 }
 
 .emailBody a{