fix: update copyright year in footer to 2026

Author: jkyberneees

index.html

@@ -1871,7 +1871,7 @@ <h2 class="section-title" style="margin-bottom: 1rem">Latest from the Blog</h2>
             <span>21no.de</span>
           </div>
           <div class="footer-links">
-            <span>© 2022 - 2025</span>
+            <span>© 2022 - 2026</span>
             <a href="mailto:contact@21no.de">Contact</a>
             <a href="https://github.com/BackendStack21">GitHub</a>
           </div>