Use "sass:list" for append function

scss/util/_breakpoint.scss

@@ -6,6 +6,8 @@
 /// @group breakpoints
 ////
 
+@use "sass:list";
+
 /// Patch to fix issue #12080
 $-zf-size: null;
 
@@ -274,7 +276,7 @@ $breakpoint-classes: (small medium large) !default;
       $found-key: true;
     }
     @if not $found-key {
-      $list: append($list, $name);
+      $list: list.append($list, $name);
     }
   }
   @return $list;

scss/util/_color.scss

@@ -3,6 +3,7 @@
 // Licensed under MIT Open Source
 
 @use "sass:color";
+@use "sass:list";
 @import 'math';
 
 $contrast-warnings: true !default;
@@ -39,7 +40,7 @@ $success-color: null !default;
 
     $rgb: if($rgb < 0.03928, divide($rgb, 12.92), pow(divide($rgb + 0.055, 1.055), 2.4));
 
-    $rgba2: append($rgba2, $rgb);
+    $rgba2: list.append($rgba2, $rgb);
   }
 
   @return 0.2126 * nth($rgba2, 1) + 0.7152 * nth($rgba2, 2) + 0.0722 * nth($rgba2, 3);

scss/util/_mixins.scss

@@ -7,6 +7,7 @@
 ////
 
 @use "sass:color";
+@use "sass:list";
 
 // Patch to fix issue #12080
 $-zf-bp-value: null;
@@ -101,7 +102,7 @@ $-zf-bp-value: null;
 
   @for $i from 2 through $bars {
     $offset: ($weight + $spacing) * ($i - 1);
-    $shadow: append($shadow, 0 $offset 0 $color, comma);
+    $shadow: list.append($shadow, 0 $offset 0 $color, comma);
   }
 
   // Icon container
@@ -133,7 +134,7 @@ $-zf-bp-value: null;
     // Generate CSS
     @for $i from 2 through $bars {
       $offset: ($weight + $spacing) * ($i - 1);
-      $hover-shadow: append($hover-shadow, 0 $offset 0 $color-hover, comma);
+      $hover-shadow: list.append($hover-shadow, 0 $offset 0 $color-hover, comma);
     }
 
     &:hover::after {

scss/util/_selector.scss

@@ -6,6 +6,8 @@
 /// @group functions
 ////
 
+@use "sass:list";
+
 /// Generates a selector with every text input type. You can also filter the list to only output a subset of those selectors.
 ///
 /// @param {List|Keyword} $types [()] - A list of text input types to use. Leave blank to use all of them.
@@ -20,7 +22,7 @@
   }
 
   @each $type in $types {
-    $return: append($return, unquote('[type=\'#{$type}\']#{$modifier}'), comma);
+    $return: list.append($return, unquote('[type=\'#{$type}\']#{$modifier}'), comma);
   }
 
   @return $return;

scss/util/_unit.scss

@@ -2,6 +2,7 @@
 // https://get.foundation
 // Licensed under MIT Open Source
 
+@use "sass:list";
 @import 'math';
 
 $unit-warnings: true !default;
@@ -52,7 +53,7 @@ $global-font-size: 100% !default;
   }
 
   @for $i from 1 through $count {
-    $rem-values: append($rem-values, -zf-to-rem(nth($values, $i), $base));
+    $rem-values: list.append($rem-values, -zf-to-rem(nth($values, $i), $base));
   }
 
   @return $rem-values;

scss/util/_value.scss

@@ -2,6 +2,8 @@
 // https://get.foundation
 // Licensed under MIT Open Source
 
+@use "sass:list";
+
 ////
 /// @group functions
 ////
@@ -105,8 +107,8 @@
     $values: ();
 
     @each $key, $val in $map {
-      $keys: append($keys, $key);
-      $values: append($values, $val);
+      $keys: list.append($keys, $key);
+      $values: list.append($values, $val);
     }
 
     @if $keep == 'keys' {