Add LinkedIn to footer

Co-authored-by: Ona <no-reply@ona.com>

Author: Siddhant-K-code

src/components/Footer.astro

@@ -49,6 +49,7 @@ const base = import.meta.env.BASE_URL.replace(/\/$/, "");
       <div class="flex gap-4">
         <a href="https://github.com/Siddhant-K-code/agentic-engineering-guide" target="_blank" rel="noopener noreferrer" class="hover:text-[var(--text-primary)] transition-colors">GitHub</a>
         <a href="https://twitter.com/Siddhant_K_code" target="_blank" rel="noopener noreferrer" class="hover:text-[var(--text-primary)] transition-colors">Twitter</a>
+        <a href="https://linkedin.com/in/Siddhant-K-code" target="_blank" rel="noopener noreferrer" class="hover:text-[var(--text-primary)] transition-colors">LinkedIn</a>
       </div>
     </div>
   </div>