fix: llm.txt url link broken (#5460)

fix url issue

docs/overrides/main.html

@@ -101,7 +101,7 @@ j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
             };
             option2.onmouseout = function() { this.style.background = 'transparent'; };
             option2.onclick = function() {
-                window.open('/llms-txt-overview/', '_blank');
+                window.open('/langgraph/llms-txt-overview/', '_blank');
                 dropdown.style.display = 'none';
             };