feat(note): use gray tokens

Author: thetaPC

core/src/components/note/note.ios.vars.scss

@@ -4,7 +4,7 @@
 // --------------------------------------------------
 
 /// @prop - Text color of the note
-$note-ios-color: $text-color-step-650;
+$note-ios-color: var(--ion-color-gray-350);
 
 /// @prop - Font size of the note
 $note-ios-font-size: dynamic-font-min(0.875, 16px);