[ci skip] Fix scss_lint repo.scss

app/assets/stylesheets/pages/repo.scss

@@ -13,7 +13,7 @@
   left: 0;
   right: 0;
   bottom: 0;
-  background: rgba(0,0,0,0.2);
+  background: $black-transparent;
 }
 
 .modal.popup-dialog {