doc: Improve the Documentation link (#278)

Signed-off-by: みけCAT <[email protected]>

Author: mikecat

docs/index.html

@@ -113,7 +113,7 @@ <h2 class="text-2xl font-bold mb-4">Installation</h2>
       </p>
       <div class="flex justify-center items-center gap-4 pb-6">
         <a
-          href="https://github.com/openwallet-foundation-labs/sd-jwt-js/wiki"
+          href="https://github.com/openwallet-foundation/sd-jwt-js/tree/main/docs"
           class="bg-black text-white font-bold py-2 px-6 rounded hover:bg-gray-700 transition-colors duration-150 ease-in-out"
           target="_blank"
           >Documentation</a