chore: add copyright year to footer

Author: molty3000

docs/index.html

@@ -622,6 +622,7 @@ <h2 style="font-size:clamp(28px,3.5vw,40px);font-weight:700;color:#fff;letter-sp
       <p>
         Built with ❤️ by <a href="https://21no.de" style="color:var(--text-secondary);text-decoration:none;">21no.de</a> — AI-native infrastructure and systems engineering research lab.
         <br>
+        © 2026 — 
         <a href="https://github.com/BackendStack21/bungate" style="color:var(--text-secondary);text-decoration:none;">GitHub</a> ·
         <a href="https://www.npmjs.com/package/bungate" style="color:var(--text-secondary);text-decoration:none;">npm</a> ·
         <a href="https://github.com/BackendStack21/bungate/blob/main/docs/DOCUMENTATION.md" style="color:var(--text-secondary);text-decoration:none;">Documentation</a>