refactor(header): improve accessibility by updating aria-labels for menu buttons

app/components/Header.tsx

@@ -42,7 +42,7 @@ export default function Header() {
                         <button
                             className="text-gray-700 hover:text-gray-900 md:hidden"
                             onClick={toggleSidebar}
-                            aria-label={isSidebarOpen ? "Close menu" : "Open menu"}
+                            aria-label={"Open menu"}
                         >
                             <svg
                                 className="w-6 h-6"
@@ -89,6 +89,7 @@ export default function Header() {
                 className={`fixed z-10 top-0 right-0 h-full bg-white w-1/3 transform transition-transform flex flex-col ${isSidebarOpen ? 'translate-x-0' : 'translate-x-full'}`}
             >
                 <button
+                    aria-label={"Close menu"}
                     className="absolute top-4 right-4 text-gray-700 hover:text-gray-900"
                     onClick={toggleSidebar}
                 >