Fix Lighthouse A11y errors on dark mode

src/components/widgets/Footer.astro

@@ -91,7 +91,7 @@ const { socialLinks = [], secondaryLinks = [], links = [], footNote = '', theme
         )
       }
 
-      <div class="text-sm mr-4 dark:text-slate-400">
+      <div class="text-sm mr-4 dark:text-muted">
         <Fragment set:html={footNote} />
       </div>
     </div>

src/navigation.js

@@ -178,6 +178,6 @@ export const footerData = {
   ],
   footNote: `
     <span class="w-5 h-5 md:w-6 md:h-6 md:-mt-0.5 bg-cover mr-1.5 rtl:mr-0 rtl:ml-1.5 float-left rtl:float-right rounded-sm bg-[url(https://onwidget.com/favicon/favicon-32x32.png)]"></span>
-    Made by <a class="text-blue-600 hover:underline dark:text-gray-200" href="https://onwidget.com/"> onWidget</a> · All rights reserved.
+    Made by <a class="text-blue-600 underline dark:text-muted" href="https://onwidget.com/"> onWidget</a> · All rights reserved.
   `,
 };