fix(scss): add missing light-blue color variable

Author: xidedix

scss/bootstrap/_variables.scss

@@ -48,6 +48,7 @@ $yellow:  #ffc107 !default;
 $green:   #28a745 !default;
 $teal:    #20c997 !default;
 $cyan:    #17a2b8 !default;
+$light-blue: #63c2de !default;
 
 $colors: () !default;
 // stylelint-disable-next-line scss/dollar-variable-default