feat: swap header from 2025 back to travel

Author: JoshuaKGoldberg

src/components/Header.astro

@@ -12,7 +12,7 @@ import { links } from "~/data/links";
 			<a href="/schedule">Schedule</a>
 			<a href="/sessions">Sessions</a>
 			<a href="/speakers">Speakers</a>
-			<a href={links.nextYear}>2025</a>
+			<a href="/travel">Travel</a>
 		</div>
 	</details>
 
@@ -23,7 +23,7 @@ import { links } from "~/data/links";
 		<a href="/schedule">Schedule</a>
 		<a href="/sessions">Sessions</a>
 		<a href="/speakers">Speakers</a>
-		<a href={links.nextYear}>2025</a>
+		<a href="/travel">Travel</a>
 	</div>
 </header>