delete an unnecessary comment

src/client/styles/scss/theme/spring.scss

@@ -66,7 +66,7 @@ html[dark] {
   $color-link-nabvar: $bgcolor-global;
   $color-inline-code: #c7254e;
 
-  // List Group colors saidebar
+  // List Group colors
   $color-list: $color-global;
   $bgcolor-list: $themelight;
   $color-list-active: $bgcolor-global;