Update link to guide

Author: hermanzdosilovic

index.html

@@ -115,7 +115,7 @@
             <i class="dropdown icon"></i>
             <div class="menu judge0-file-menu">
                 <a href="https://github.com/judge0/ide" class="link text item" target="_blank"><i class="external square alternate icon"></i>GitHub Repository</a>
-                <a href="https://github.com/judge0/ide/tree/master/embed" class="link text item" target="_blank"><i class="external square alternate icon"></i>Embed Guide</a>
+                <a href="/embed" class="link text item" target="_blank"><i class="external square alternate icon"></i>Embed Guide</a>
                 <a href="https://platform.sulu.sh/apis/judge0" class="link text item" target="_blank"><i class="external square alternate icon"></i>HTTP API Documentation</a>
                 <a href="PRIVACY.md" class="link text item" target="_blank"><i class="external square alternate icon"></i>Privacy Policy</a>
                 <a href="TERMS.md" class="link text item" target="_blank"><i class="external square alternate icon"></i>Terms of Service</a>