[BUG] Compile warning with dart-sass

[cognvn]

Describe the bug

When compile scss with dart-sass (node-sass is deprecated) get the warning:

WARNING: You probably don't mean to use the color value white in interpolation here.
It may end up represented as white, which will likely produce invalid CSS.
Always quote color names when using them as strings or map keys (for example, "white").
If you really want to use the color value here, use '"" + $color'.

change $color to "" + $color in file src/scss/utils/_colors.scss fix it

@if $enable-extra-colors {
  @each $color, $value in map-merge($colors, (dark: $dark, muted: $text-muted, white: $white)) {
    .bg-#{"" + $color} {
      background: $value;
    }

    .text-#{"" + $color} {
      color: $value !important;
    }

    .bg-#{"" + $color}-lt {
      color: theme-color-darker($value) !important;
      background: theme-color-lighter($value, true) !important;
    }
  }
}