fix scss

Author: kseamon

src/material/core/style/_vendor-prefixes.scss

@@ -38,4 +38,9 @@
   -webkit-backface-visibility: $value;
   backface-visibility: $value;
 }
+
+@mixin position-sticky {
+  position: -webkit-sticky;
+  position: sticky;
+}
 /* stylelint-enable */

src/material/table/table.scss

@@ -1,3 +1,5 @@
+@use '../core/style/vendor-prefixes';
+
 $mat-header-row-height: 56px;
 $mat-row-height: 48px;
 $mat-row-horizontal-padding: 24px;
@@ -116,6 +118,5 @@ th.mat-header-cell:last-of-type, td.mat-cell:last-of-type, td.mat-footer-cell:la
 }
 
 .mat-table-sticky {
-  position: -webkit-sticky;
-  position: sticky;
+  @include vendor-prefixes.position-sticky;
 }