fix: playground heading matching theme (#1662)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

Author: JReinhold

app/components/Package/Playgrounds.vue

@@ -119,10 +119,7 @@ function focusMenuItem(index: number) {
 
 <template>
   <section v-if="links.length > 0" class="px-1">
-    <h2
-      id="playgrounds-heading"
-      class="text-xs font-mono text-fg-subtle uppercase tracking-wider text-white mb-3"
-    >
+    <h2 id="playgrounds-heading" class="text-xs font-mono text-fg uppercase tracking-wider mb-3">
       {{ $t('package.playgrounds.title') }}
     </h2>