chore: update year

Author: jooyoungseo

_quarto.yml

@@ -102,7 +102,7 @@ website:
     # Proudly supported by
     # [![](https://www.rstudio.com/assets/img/posit-logo-fullcolor-TM.svg){fig-alt="Posit" width=65px}](https://posit.co)
     center: |
-      <span style="color: #2377cc;">&copy; 2024 &middot; Made with </span>
+      <span style="color: #2377cc;">&copy; 2025 &middot; Made with </span>
       <a href="https://quarto.org/" style="color: #000000;">
         <img src="https://quarto.org/quarto.png" alt="Quarto" width="65px">
       </a>