docs(ThemePicker): wrong neutral color

Author: benjamincanac

docs/app/components/theme-picker/ThemePicker.vue

@@ -111,7 +111,7 @@ function setBlackAsPrimary(value: boolean) {
             v-for="color in neutralColors"
             :key="color"
             :label="color"
-            :chip="color"
+            :chip="color === 'neutral' ? 'old-neutral' : color"
             :selected="neutral === color"
             @click="neutral = color"
           />