docs: updated url

Author: designcise

README.md

@@ -8,7 +8,7 @@ A simple theme toggle for Next.js 13+ that allows switching between light and da
 </html>
 ```
 
-You can then [use different CSS selectors to create styles for dark/light themes](https://www.designcise.com/web/tutorial/how-to-create-non-flickering-dark-or-light-mode-toggle-in-next-js#switching-theme).
+You can then [use different CSS selectors to create styles for dark/light themes](https://www.designcise.com/web/tutorial/how-to-create-non-flickering-dark-or-light-mode-toggle-in-next-js-using-localstorage#adding-the-ability-to-switch-themes).
 
 ## Features