Apply !default to SCSS variables

Missed one variable :(

diff --git a/scss/_variables.scss b/scss/_variables.scss
index e4b6387324adcf09ea743af09d0d1c63d135f7ed..cfaf954a15c5c3d809cf9ba9c35d114509eb7887 100644 (file)
--- a/scss/_variables.scss
+++ b/scss/_variables.scss
@@ -451,8 +451,7 @@ $card-border-width:        .0625rem !default;
 $card-border-radius:       .25rem !default;
 $card-border-color:        #e5e5e5 !default;
 $card-border-radius-inner: ($card-border-radius - $card-border-width) !default;
-
-$card-cap-bg: #f5f5f5;
+$card-cap-bg:              #f5f5f5 !default;
 
 // Tooltips