Update coreui.scss

Author: MartijnBastiaansen

scss/coreui.scss

@@ -10,7 +10,7 @@
 @import "variables";
 
 // Import Bootstrap source files
-@import "node_modules/bootstrap/scss/bootstrap"; // from bootstrap node_modules
+@import "bootstrap/bootstrap"; // from bootstrap node_modules
 
 // Mixins
 @import "mixins";