revert token change

Author: BenOsodrac

core/src/components/select/select.ionic.scss

@@ -9,7 +9,7 @@
   --background: #{globals.$ion-primitives-base-white};
   // TODO(ROU-10778, ROU-10875): Sync the color names to the design system of
   // ios and md. This will allow us to have a single color map.
-  --border-color: #{globals.$ion-primitives-neutral-800};
+  --border-color: #{globals.$ion-primitives-neutral-500};
   --border-width: #{globals.$ion-border-size-025};
   --padding-start: #{globals.$ion-space-400};
   --padding-end: #{globals.$ion-space-400};