fix draft notice in dark mode

src/pages/posts.astro

@@ -65,6 +65,7 @@ const posts = await Promise.all(entries.map(async entry => {
     .draft-notice {
         font-size: 0.5em;
         font-family: 'Figtree Variable', sans-serif;
+        color: var(--nav-link-color);
         background-color: var(--accent-color);
         padding: 0.05em 0.5em;
         border-radius: 20% / 50%;