Some minor fixes.

src/components/NotFound.tsx

@@ -2,9 +2,9 @@ import "./styles/notFound.scss";
 
 export const NotFound = () => {
     return (
-        <article>
+        <section>
             <h1>Page not found</h1>
             <p>Check the link address...</p>
-        </article>
+        </section>
     )
 }