chore(frontend): update Next to 13.0.4

frontend/components/BlueLink.tsx

@@ -7,10 +7,8 @@ export type Props = {
 
 export default function BlueLink({ to, children }: Props) {
   return (
-    <Link href={to}>
-      <a className="hover:underline text-sky-500 dark:text-sky-400">
-        {children}
-      </a>
+    <Link href={to} className="hover:underline text-sky-500 dark:text-sky-400">
+      {children}
     </Link>
   );
 }

frontend/components/NavItem.tsx

@@ -9,10 +9,11 @@ export interface Props {
 
 export default function NavItem(props: Props) {
   const ret = (
-    <Link href={props.href}>
-      <a className="hover:text-sky-500 dark:hover:text-sky-400">
-        {props.children}
-      </a>
+    <Link
+      href={props.href}
+      className="hover:text-sky-500 dark:hover:text-sky-400"
+    >
+      {props.children}
     </Link>
   );
 

frontend/components/Navigation.tsx

@@ -73,9 +73,7 @@ export default function Navigation() {
           <div className="py-4 mx-4">
             <div className="flex items-center">
               <Link href="/" passHref>
-                <a>
-                  <Logo />
-                </a>
+                <Logo />
               </Link>
               <div className="ml-auto flex items-center">
                 <nav className="hidden lg:flex">