Rename PageNotFound page component files

src/pages/PageNotFound/PageNotFoundPage.jsx

@@ -1,9 +1,9 @@
 import Background from "../../components/Background/Background.jsx";
-import styles from "./PageNotFound.module.css"
+import styles from "./PageNotFoundPage.module.css"
 import { useNavigate } from "react-router";
 import { APP_CONFIG } from "../../config/appConfig.js";
 
-export default function PageNotFound() {
+export default function PageNotFoundPage() {
 
     const navigate = useNavigate();