Fix warning for unique key prop

src/_components/navbar.tsx

@@ -42,7 +42,7 @@ export default function Navbar() {
     <nav className="navbar">
       <ul className="navbar-list">
         {items.map((item) => (
-          <li>
+          <li key={item.title}>
             <a href={item.path} className="button">
               <img
                 alt={item.icon.alt}